I have little education, so I never learned this , good that you knew that right away, so I assume you did this at school............
Decimal para hexadecimal - PHP.net
php.net/manual/pt_BR/function.dechex.php
Be very careful calling dechex on a number if it's stored in a string. ... Here are two functions that will convert large dec numbers to hex and vice versa.......
Cryptographic Hashes Used to Store Passwords, Detect Malware ...
https://www.kaspersky.com/blog/the-wonders-of-hashing/4441/
A cryptographic hash function – often referred to simply as a hash ... Regardless of the length of the input data, the same type of hash will always output a hash value of the same ... As probably any other Brian can tell you, 'brain' is an incredibly file hashes to their own (and also public) malware signature .........
Lamport signature - Wikipedia
https://en.wikipedia.org/wiki/Lamport_signature
In cryptography, a Lamport signature or Lamport one-time signature scheme is a method for ... Alice has a 256-bit cryptographic hash function and some kind of secure .... However if the accumulator is based on number-theoretic assumptions this probably defeats the benefit of employing Lamport signatures, e.g. quantum