diff --git a/readme.md b/readme.md index 483e70e..bdff408 100644 --- a/readme.md +++ b/readme.md @@ -76,17 +76,17 @@ Without saying, this is more advanced and not as-easy as the methods supplied in ### Modes of operation * [CBC] This block cipher makes use of cipher block chaining. Nothing special. -* [IV] The initialization vector is indeed a bit of special sauce, as it depends on your key instead of being static. It is generated by running the feistel network on *E(m=seed, k=seed)*. +* [IV] The initialization vector is indeed a bit of special sauce, as it depends on your key instead of being static. It is generated by running the feistel network on *E(m=seed, k=seed)*, which is a one-way function, because *m=k*. * [RRKM] Never heard of a mode like this, so i've named it **R**olling**R**ound**K**ey**M**ode. This basically means that the round key extrapolation is carried out continously over EVERY round on EVERY block. So in addition to *Mi* being dependent on *E(Mi-1,Ki-1,0)* due to CBC, so is now *Ki* dependent on *Ki-1,r* with *r* being the maximum number of extrapolated keys within a call of *E()*. This is handled within the feistel network class, as an instance lifecycle sees all blocks, if you want to take a peek. ### Password to key How does *GC* transform a password to a key? First up, we have to establish what requirements this transformation must fulfill: * A full key. Not just *len(passwd)\*8* bits and the rest zero-padded. -* Even if *len(passwd\*8) > KEY_SIZE*, every bit of the password should affect the key +* Even if *len(passwd)\*8 > KEY_SIZE*, every bit of the password should affect the key * Ideally good collision resistance -Let's be honest, I'm not a cryptographer, i have no idea how collision resistant this is. +Let's be honest, I'm not a cryptographer, I have no idea how collision resistant this is. This means, it has to be considered *insecure*! I have tried a few passwords brute-forcibly, experimentally (about 1mil) and have not been able to produce a collision. Obviously there have to be collisions, since *|P|, len\(p\) ∈ ℵ ≫ |C|*.