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For challenges involving bitwise commands or manipulation of numbers at the bit level

0 votes

Shifty XORyption

Javascript (ES6) 83 + 73 = 156 Both functions take input as and ouput an array of numbers to represent bytes. Encrypt 85 84 83 E=s=>s.concat((h=s.reduce((x,y)=>x^y))<<4&240^h).map(x=>a<<4&240|(a=x^ …
  • 4,960
17 votes
4 answers
937 views

Shifty XORyption

Write a program or function (or set of programs/functions) to encrypt and decrypt data given the following specification: Encryption Calculate an XOR hash of the input by XOR-ing every byte with ea …
  • 4,960