Changing my “KDF Iterations” in my Vault UI will change the value of client_kdf_iterations. You can do both, but if you're concerned about iterations being too low, add 1-2 extra chars. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). log file is updated only after a successful login. I think the . 12. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. Exploring applying this as the minimum KDF to all users. (The key itself is encrypted with a second key, and that key is password-based. . AbberantSalience (LwS) June 14, 2023, 7:43am 2 I believe the recommended number of iterations is 600,000. Argon2 KDF Support. For which i also just created a PR #3163, which will update the server-side to at least 350_000 iterations instead of 100_000. I have created basic scrypt support for Bitwarden. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Exploring applying this as the minimum KDF to all users. The number of KDF iterations is cached in your local vault, so none of this applies unless you are logging in to a Bitwarden client. The user probably wouldn’t even notice. 2877123795. Among other. When you change the iteration count, you'll be logged out of all clients. )This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. RE: Increasing KDF Iterations… Are there any inherent problems caused by increasing KDF iterations? That is, any risk of losing data, etc. Hit the Show Advanced Settings button. Among other. 2 Likes. 1. Dear Community I searched this community and the web in general, but I did not find a solution for my problem yet, no matter what I tried. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. I had never heard of increasing only in increments of 50k until this thread. Bitwarden also uses the PBKDF2 KDF, but as of this writing, with a more secure minimum of 600,000 iterations. What you did there has nothing to do with the client-side iteration, that is only for storing the password hash by Vaultwarden. Therefore, a. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. 1. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. grb January 26, 2023. With the warning of ### WARNING. A question: For purposes of risk/benefit analysis, how does the hashing/encryption process differ from what is done in the regular encrypted export?With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Higher KDF iterations can help protect your master password from being brute forced by an attacker. 5 million USD. 10. For other KDFs like argon2 this is definitely. Among other. Expand to provide an encryption and mac key parts. log file is updated only after a successful login. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. On mobile, I just looked for the C# argon2 implementation with the most stars. Unless there is a threat model under which this could actually be used to break any part of the security. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. It has to be a power of 2, and thus I made the user. 000+ in line with OWASP recommendation. If I end up using argon2 would that be safer than PBKDF2 that is being used. Security Now podcast did a follow-up to the last episode on the LastPass debacle and one of the things that Steve Gibson mentioned is that vault providers need to move away from PBKDF2 and the number of hash iterations to an algorithm that is resistant to GPU attacks. Ask the Community. Kyle managed to get the iOS build working now,. Passwords are chosen by the end users. (and answer) is fairly old, but BitWarden. ” From information found on Keypass that tell me IOS requires low settings. Exploring applying this as the minimum KDF to all users. The cryptographic library used, is BouncyCastle, the same one Bitwarden already uses on Android for other cryptographic functions. In this case, we recommend to use a relatively low value for the Argon2 memory parameter (64 MB or less, depending on the app and the database size) and a relatively high number of iterations. Among other. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. How about just giving the user the option to pick which one they want to use. On the typescript-based platforms, argon2-browser with WASM is used. Therefore, a. of Cores x 2. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. ## Code changes - manifestv3. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. The recent LastPass breach has put a lot of focus on the number of PBKDF2 hash iterations used to derive the decryption key for the password vault. I have created basic scrypt support for Bitwarden. Regarding password protected exports, the key is generated through pbkdf2 and stretched using hkdf. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. "The default iteration count used with PBKDF2 is 100,001 iterations on the client (client-side iteration count is configurable from your account settings), and then an additional 100,000 iterations when stored on our servers (for a total of 200,001 iterations by. log file somewhere safe). Export your vault to create a backup. 2FA was already enabled. I had never heard of increasing only in increments of 50k until this thread. According to comments posted by Quexten at Bitwarden's community forums, the company has a 5-week release cycle, so we could expect Argon2 support to be added next month on all platforms if the tests are successful. The user probably wouldn’t even notice. At our organization, we are set to use 100,000 KDF iterations. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Among other. json exports. ), creating a persistent vault backup requires you to periodically create copies of the data. none of that will help in the type of attack that led to the most recent lastpass breach. By default, the iteration count in the client is 5,000 but supports up to 2,000,000. This seems like a delima for which Bitwarden should provide. Feb 4, 2023. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. The try it again with Argon2id, using the minimum settings for memory (16 MiB) and iterations (2. This article describes how to unlock Bitwarden with biometrics and. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. 1. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). 3 KB. However, the format and encryption algorithm are open source, and there are third-party tools that can decrypt these files (e. High kdf iterations aren't necessary if your main password is actually strong, though if your phone struggles with 100k iterations it could be very old and you shouldn't be storing passwords on it. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. The point of argon2 is to make low entropy master passwords hard to crack. The higher the memory used by the algorithm, the more expensive it is for an attacker to crack your hash. If that was so important then it should pop up a warning dialog box when you are making a change. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. OK fine. Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. In addition to having a strong master password, default client iterations are being increased to 600,000 as well as double-encrypting these fields at rest with keys managed in. 2. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. Scroll further down the page till you see Password Iterations. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. For scrypt there are audited, and fuzzed libraries such as noble-hashes. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. Can anybody maybe screenshot (if. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Or it could just be a low end phone and then you should make your password as strong as possible. This setting is part of the encryption. Do beware, Bitwarden puts a limit of 10 iteration rounds because in QA testing, it was unlimited, which lead to a tester having a 30 minute unlock time (1k+ iterations at 1GiB memory). Bitwarden Community Forums Argon2 KDF Support. Bitwarden has recently made an improvement (Argon2), but it is "opt in". PBKDF2 default now apparently 600,000 (for new accounts) In addition to having a strong master password, default client iterations are being increased to 600,000 as well as double-encrypting these fields at rest with keys managed in Bitwarden’s key vault (in addition to existing encryption). We recommend a value of 600,000 or more. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. The user probably wouldn’t even notice. We recommend that you increase the value in increments of 100,000 and then test all of your devices. The user probably wouldn’t even notice. grb January 26, 2023, 3:43am 17. Generally, Max. Hi, I currently host Vaultwarden version 2022. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. log file gets wiped (in fact, save a copy of the entire . Unless there is a threat model under which this could actually be used to break any part of the security. Our default is 100,000 iterations, the Min allows for higher performance at the user's discretion but the key length combined with the password still makes this relatively. I think PBKDF2 will remain the default for audits and enterprise where FIPS-140 compliance is an expectation. The number of default iterations used by Bitwarden was increased in February, 2023. We recommend a value of 600,000 or more. Unless there is a threat model under which this could actually be used to break any part of the security. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Exploring applying this as the minimum KDF to all users. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. We recommend a value of 600,000 or more. PBKDF2 600. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change. Therefore, a rogue server could send a reply for. Keep in mind having a strong master password and 2FA is still the most important security aspect than adding additional bits of. 5s to 3s delay or practical limit. (for a single 32 bit entropy password). This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. On the typescript-based platforms, argon2-browser with WASM is used. On the typescript-based platforms, argon2-browser with WASM is used. Higher KDF iterations can help protect your master password from being brute forced by an attacker. When you change the iteration count, you'll be logged out of all clients. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) =. log file is updated only after a successful login. Among other. Next, go to this page, and use your browser to save the HTML file (source code) of that page. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). The negative would be if you have a device with insufficient computing power, setting the KDF iterations too high could cause the login process to slow down so much that you are effectively locked out (this is why Bitwarden recommends. Mobile: The C implementation of argon2 was held up due to troubles building for iOS. After changing that it logged me off everywhere. Due to the recent news with LastPass I decided to update the KDF iterations. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Kyle managed to get the iOS build working now,. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. One component which gained a lot of attention was the password iterations count. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). Therefore, a rogue server could send a reply for. (and answer) is fairly old, but BitWarden. Among other. I went into my web vault and changed it to 1 million (simply added 0). Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. I think the . Hey @l0rdraiden see earlier comments, including Encryption suggestions (including Argon2) - #24 by cscharf for more information. Therefore, a rogue server could send a reply for. It has to be a power of 2, and thus I made the user configurable work factor a drop down selection. 4. Due to the recent news with LastPass I decided to update the KDF iterations. Click on the box, and change the value to 600000. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Changed my master password into a four random word passphrase. Sometimes Bitwarded just locks up completely. Likewise, I'm not entirely sure which of the three WebAssembly buttons is most representative of how the Bitwarden client-side hashing algorithm will perform. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Source: personal experience with a low-end smartphone taking 10-15s to unlock the vault with max KDF iterations count. Since I don't expect that Bitwarden needs to frequently add new KDF's with new parameters, this pull request simply adds 2 integer columns for the memory consumption, and the parallelism of the KDFs. •. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. Going to see if support can at least tell me when my password was last changed (to rule out a very implausible theory), and at the very least see if it’s possible for them to roll my vault back to my old password,. This was mentioned as BWN-01-009 in Bitwarden’s 2018 Security Assessment, yet there we are five years later. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. If your original password is 50 bits of entropy, each additional bit is (theoretically) double as costly to crack. The point of argon2 is to make low entropy master passwords hard to crack. I. I don’t think this replaces an. For scrypt there are audited, and fuzzed libraries such as noble-hashes. Accounts created after that time will use 600,001, however if you created your account prior to then you should increase the iteration count. So if original entropy (of passphrase) with 2 iteration = +1 (effective) entropy. Now I know I know my username/password for the BitWarden. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. 12. The user probably wouldn’t even notice. Another KDF that limits the amount of scalability through a large internal state is scrypt. Unlike a rotation of the account encryption key, your encrypted vault data are completely unaffected by a change to the KDF iterations, so there is no risk involved in continuing to use devices that are still using a deauthorized token (at most, you may get unexpectedly logged out when trying to update a vault item or sync the vault). Higher KDF iterations can help protect your master password from being brute forced by an attacker. Then edit Line 481 of the HTML file — change the third argument. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. OK fine. trparky January 24, 2023, 4:12pm 22. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Low KDF alert: A new alert will appear in the web app when a user's KDF iterations are lower than. So I go to log in and it says my password is incorrect. , BitwardenDecrypt), so there is nothing standing in the way of. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. The point of argon2 is to make low entropy master passwords hard to crack. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. I guess I’m out of luck. 4. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. RogerDodger January 26,. For algorithm, I choose PBKDF2 SHA-256 and set my iterations to 500,000. I went into my web vault and changed it to 1 million (simply added 0). My recommendation is to try to increase the KDF size (by 50k or 100k at a time) and then test it on all the devices you use Bitwarden on by logging out of the page/app and then log back. ddejohn: but on logging in again in Chrome. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. We recommend a value of 600,000 or more. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. The point of argon2 is to make low entropy master passwords hard to crack. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Don't worry about changing any of the knobs or dials: just change KDF algorithm completely. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Question about KDF Iterations. 10. app:web-vault, cloud-default, app:all. I went into my web vault and changed it to 1 million (simply added 0). 1 Like. Argon2 (t=10, m=512MB, p=4) - 486. Among other. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. Should your setting be too low, I recommend fixing it immediately. Exploring applying this as the minimum KDF to all users. Therefore, a. The point of argon2 is to make low entropy master passwords hard to crack. Unless there is a threat model under which this could actually be used to break any part of the security. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. See here. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. We recommend a value of 600,000 or more. The user probably wouldn’t even notice. I think the . log file is updated only after a successful login. log file is updated only after a successful login. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. The back end applies another 1,000,000. If the KDF iteration count is set too high, some devices may fail to complete the PBKDF2-HMAC-SHA256 calculation because of insufficient computing power — this is more likely to occur on mobile devices and older hardware. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Vaultwarden works! More data, on the desktop I downgraded the extension for FF to 2022. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. The user probably wouldn’t even notice. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). The point of argon2 is to make low entropy master passwords hard to crack. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. ), creating a persistent vault backup requires you to periodically create copies of the data. I have created basic scrypt support for Bitwarden. Password Manager. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. More specifically Argon2id. anjhdtr January 14, 2023, 12:03am 12. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. I think the . Password Manager. 000 iter - 228,000 USD. Is at least one of your devices a computer with a modern CPU and adequate RAM? Did you increase the KDF iterations gradually, in. Then edit Line 481 of the HTML file — change the third argument. I think the . I’m writing this to warn against setting to large values. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. Also notes in Mastodon thread they are working on Argon2 support. Also make sure this is done automatically through client/website for existing users (after they. A setting of KDF algorithm: Argon2id - KDF iterations: 8 - KDF memory (MB): 96 - KDF parallelism: 6 has always worked thus far. Feature function Allows admins to configure their organizations to comply with. Check the kdfIterations value as well, which presumably will equal 100000. I appreciate all your help. Then edit Line 481 of the HTML file — change the third argument. Hey @Quexten we’re switching over to Github discussions to keep the PR chats closer to the code. The user probably. In src/db/models/user. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Bitwarden Community Forums Master pass stopped working after increasing KDF. But it will definitely reduce these values. In contrast, Dmitry Chestnykh wrote a well-researched piece in 2020 (with an update in January 2023) that describes exactly how a brute-force attack against a stolen Bitwarden vault would be possible using only 100,000 PBKDF2 iterations (or the KDF iteration value set by the user) per password guess, and even proposed an improved authentication. You should switch to Argon2. 0 update changes the number of default KDF iterations to 600,000, you can change it manually too. Among other. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Increasing KDF interations grb January 2, 2023, 6:30pm 2 Nothing wrong with your approach, but it may be unnecessarily cautious. 2 Likes. With the warning of ### WARNING. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Unless there is a threat model under which this could actually be used to break any part of the security. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Among other. Check the upper-right corner, and press the down arrow. The user probably wouldn’t even notice. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Exploring applying this as the minimum KDF to all users. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. On the cli, argon2 bindings are. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. It doesn’t seem like the increased KDF iterations are the culprit, so the above appears to be the most likely possibility. The feature will be opt-in, and should be available on the same page as the password iteration settings in Bitwarden's web vault. LastPass had (and still has) many issues, but one issue was allowing low iterations (1 or 500) on their KDF. 4. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. In this case, we recommend to use a relatively low value for the Argon2 memory parameter (64 MB or less, depending on the app and the database size) and a relatively high number of iterations. Unless there is a threat model under which this could actually be used to break any part of the security. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. g. If your passphrase has fewer than 6 words, then the password entropy and KDF work together to secure your vault. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Also, check out. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. TBC I’m a new user so I don’t know but this question was asked 2 days ago and the answer was “your encrypted vault data are completely unaffected by a change to the KDF iterations” I was suprised because I thought increasing the PBKDF2 iterations would give a new master key and therefore a new encryption key. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. app:all, self-hosting. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. This article describes how to unlock Bitwarden with biometrics and. 1 was failing on the desktop. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The user probably wouldn’t even notice. Exploring applying this as the minimum KDF to all users. 0 (5786) on Google Pixel 5 running Android 13. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Higher KDF iterations can help protect your master password from being brute forced by an attacker. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. e the client now gets something like: ``` { kdfType: 0, kdfIterations: 100000, kdfMemory: 1000, kdfParallelism: 2 } ``` As in the prelogin. Bitwarden Community Forums Argon2 KDF Support. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. I think the . This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. (or even 1 round of SHA1). The user probably wouldn’t even notice. "The default iteration count used with PBKDF2 is 100,001 iterations on the client (client-side iteration count is configurable from your account settings), and then an additional. ” From information found on Keypass that tell me IOS requires low settings. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change your master password or KDF iterations, if Bitwarden resets their servers, etc. Good to. I just found out that this affects Self-hosted Vaultwarden as well. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. This article describes how to unlock Bitwarden with biometrics and. This is a bad security choice.