Tabula Recta - InCTF Internationals 2021 ph03n1x 4l3x1 2021-08-20 Crypto / RC4 cipher / InCTFi Official writeup of Crypto challenge “Tabula Recta” from InCTFi 2021 tl;dr Retrive first few bytes of table through Matrix calculations, then find which special b-exact key is used. Read More Elliptic Curve RC4 Password Manager