Literatecode

“The purpose of this note is to present a few nonlinear invertible functions with a single cycle” read (pdf, 95k)

Look at this number:

11732185257448480166176242876112284486042742946131111493953183550895075811
11973086857454524059995754051178328588785835318415029838850875091778558864
902895107205590716638457567080120811328335840498029896573618086708333433
What is so special about it? Well, it is a prime number. Moreover it is a prime number of a special form N º p (mod q), where N, p and q are all primes. Moreover it is a prime number, which is

N º 541 (mod 547)
N º 523 (mod […]

Turn your PDA into OATH OTP token with hmacOTP software for free
There is the draft standard “HOTP: An HMAC-based One Time Password Algorithm” as a result of OATH efforts. Putting aside political issues this current draft does not sounds proper to-be-a-standard. The proposed algorithm is good but the draft covers only a very simple case […]

This note describes the algorithm named Sapparot. It is a pseudo-random number generator (PRNG) with good statistical characteristics and performance. This generator consists of two 32-bits rotors with 32-bits output as a result of exclusive-OR (XOR) rotors confusion. The figure 1 below illustrates a round of Sapparot.

Figure 1: One round of Sapparot

Both A and B […]

There was a 32-bit hash function I’ve played around some time ago. Not a big deal. Who need such hashes (even that days) anyway? But the benefit of this hash was easy conversion to PRNG and this is why Yasmarang came up as a replacement.
Yasmarang is a simple pseudorandom number generator with small footprint and […]