秘密 ひみつ鍵 かぎ暗号 あんごう方式 ほうしき

himitsukagiangōhōshiki

1. Not a secret key cryptosystem.

1. Was a secret key cryptography method.

1. Secret key cryptography

1. Secret key cryptography; Secret-key cryptographic

1. It is not a secret key cryptosystem.

1. It's not a secret key cryptosystem.

1. Was a secret key cryptography method.

1. Secret key cryptography.

1. It is not a secret key cryptosystem.

1. Was not a secret key encryption method.

1. Probably a secret key cipher.; Likely a secret key encryption method.

1. Was not a secret key cryptosystem.; Was not a private key scheme.

1. Wasn't a secret key encryption method.

1. Probably a secret key cipher.; Likely a secret key encryption method.

1. Was not a secret key encryption method.

1. If/when secret key cryptography…; If secret key cryptography were…

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

1. If/when secret key cryptography…; If using secret key cryptography…