換かえ字じ式しき暗あん号ごう

noun

substitution cipher

A cryptographic method where each character in the plaintext is replaced by another according to a fixed system.

• 換かえ字じ式しき暗あん号ごうは、文も字じを別べつの文も字じに置おき換かえる暗あん号ごう方ほう式しきです。

  A substitution cipher is an encryption method that replaces characters with other characters.