秘密 ひみつ かぎ暗号 あんごうだったら
himitsukagiangōdattara

Noun
Da Copula

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

1. If/when [it] is a secret key cipher.; If [it] were a secret key cipher.

Tara Conditional
Computing