共有 きょうゆう かぎ暗号 あんごうではありませんでした
kyōyūka gian gōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 共有鍵暗号

1. Was not a shared key cipher.; Was not a shared secret key encryption.

Past/Perfective
Negative
Polite
Formal Register
Computing