noun
equivocation; equivocation amount
A technical term in information theory and cryptography, referring to the amount of uncertainty about a message or key given the ciphertext. Not used in everyday language.
暗号理論では、あいまい量は鍵の不確かさを測る指標の一つだ。
In cryptography, equivocation is one measure of key uncertainty.
エントロピー is a broader measure of uncertainty or randomness, while あいまい量 specifically refers to equivocation in the context of secrecy systems.
Compound of 曖昧 (あいまい, 'ambiguous') and 量 (りょう, 'amount'), likely a calque of the English term 'equivocation' in information theory.