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What are the parameters of the scrypt algorithm?
The Scrypt algorithm takes several input parameters and produces the derived key as output: N – iterations count (affects memory and CPU usage), e.g. 16384 or 2048 p – parallelism factor (threads to run in parallel – affects the memory, CPU usage), usually 1
How to do a scrypt calculation in Python?
Run the above code example: https://repl.it/@nakov/Scrypt-in-Python. The Scrypt calculation function takes several input parameters: the password (bytes sequence), the salt (bytes sequence), iterations count, block size for each iteration, parallelism factor and the output key length (number of bytes for the derived key).
How are passwords stored in a scrypt file?
In many applications, frameworks and tools, Scrypt encrypted passwords are stored together with the algorithm settings and salt, into a single string (in certain format), consisting of several parts, separated by $ character.
What’s the difference between complexity and length of passwords?
The debate is always open, and the length vs. complexity issue divides experts and users. Both have pros and cons as well as their own supporters. Let’s face it, most users tend to create terrible passwords and seldom change them.
What are the default settings for scrypt in myetherwallet?
In the MyEtherWallet crypto wallet, the default Scrypt parameters are N=8192, r=8, p=1. These settings are not strong enough for crypto wallets, but this is how it works. The solution is to use long and complex password to avoid password cracking attacks.
How much memory is needed for scrypt key derivation?
The memory required to compute Scrypt key derivation is calculated as follows: Example: e.g. 128 * N * r * p = 128 * 16384 * 8 * 1 = 16 MB (or 128 * N * r * p = 128 * 2048 * 8 * 1 = 2 MB) Choosing parameters depends on how much you want to wait and what level of security (password cracking resistance) do you want to achieve:
Which is the best way to use scrypt?
You can perform tests and choose the Scrypt parameters yourself during the design and development of your app or system. Always try to use the fastest possible implementation of Scrypt for your language and platform, because crackers will definitely use it. Some implementations (e.g. in Python) may be 100 times slower than the fastest ones!