What is bcrypt and Scrypt?
TL;DR; SHA1, SHA256, and SHA512 are all fast hashes and are bad for passwords. SCRYPT and BCRYPT are both a slow hash and are good for passwords. Always use slow hashes, never fast hashes. User passwords must be stored using secure hashing techniques with a strong algorithm like SHA-256.
Is sha512 better than bcrypt?
SHA-512 has been designed to be fast. You don’t want any delays when validating a signature, for instance. There is no reason for generic cryptographic hashes to be slow. bcrypt on the other hand is a password hash that performs key strengthening on the input.
What’s the difference between bcrypt and scrypt passwords?
You input your password to the algorithm and after significant (relative) computation, an output is produced. Bcrypt has been around since the late 90s and has handled significant scrutiny by the information security/cryptography community. It has proven reliable and secure over time. Scrypt is an update to the same model from which Bcrypt arose.
Which is better for distributed cracking, scrypt or bcrypt?
There’s really only one reason to choose SCrypt over BCrypt and it’s the reason that SCrypt was designed: BCrypt’s main weakness against a distributed cracking system is low, constant memory usage. This makes BCrypt vulnerable to cost-effective brute-forcing using relatively inexpensive Field-Programmable Gate Arrays or FPGAs.
Are there any dangers to using bcrypt and scrypt?
The dangers of Bcrypt and Scrypt are that you will: One final thought. Of course there must be some sort of minimal difficulty level for the T value as if T = 0 then E = 0 in all cases. It is reasonable to expect that as computers become more powerful, so too should our hashing algorithms.
Which is better PBKDF2 or scrypt on GPU?
PBKDF2 can be thoroughly optimized with GPU, while bcrypt and scrypt are much less GPU-friendly. Bcrypt and scrypt both require fast RAM, which is a scarce resource in a GPU (a GPU can have a lot of RAM, but will not be able to access it from all cores simultaneously).