秘密 ひみつ かぎ暗号 あんごうじゃありませんでした
himitsukagiangōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 秘密鍵暗号

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

Past/Perfective
Negative
Polite
Terminal Form
Computing