共通 きょうつう かぎ暗号 あんごうじゃありませんでした
kyōtsūkagiangōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 共通鍵暗号

1. Was not a symmetric-key cipher.; Was not a shared-key cipher.

Past/Perfective
Negative
Polite
Terminal Form
Computing