oguz
crypto
.ru
Caesar
Playfair
Polyalphabetic
Hill
OTP
Shift
Input
Encrypt
Decrypt
Output
Key
Input
Encrypt
Decrypt
Output
Key
Input
Encrypt
Decrypt
Output
Matrix size (n×n)
Key matrix (0–25 per cell)
Input
Encrypt
Decrypt
Output
One-time key (letters only, at least as long as message — never repeated)
Input
Encrypt
Decrypt
Output