noun
one-way function
A cryptographic function that is easy to compute in one direction but computationally infeasible to invert.
ハッシュ関数は一方向性関数の一種です。
A hash function is a type of one-way function.
Compound of 一方向性 (one-way property) and 関数 (function), likely a calque from English 'one-way function'.