秘密 ひみつ かぎ暗号 あんごう方式 ほうしきであれば
himitsukagiangōhōshikideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 秘密鍵暗号方式

1. If it is a secret key cryptography method; If secret key cryptography were used

Ba Conditional
Computing