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kyōyūkagiangōhōshiki

1. Not shared-key cryptography.

1. Was a shared-key cryptosystem.

1. Shared-key cryptography

1. Shared-key cryptography; Shared-key encryption

1. It is not a shared-key cryptosystem.

1. It's not shared-key cryptography.; It isn't shared-key encryption.

1. Shared key cryptography was.

1. Shared-key cryptography.

1. It is not a shared-key cipher.; It is not a symmetric-key cipher.

1. Was not a shared-key cryptosystem.

1. Probably shared-key cryptography.

1. Was not a shared-key cryptosystem.

1. Wasn't shared-key cryptography.; Wasn't a shared-key encryption method.

1. Shared-key cryptography; Probably shared-key cryptography

1. Was not a shared-key cryptosystem.

1. If/when shared-key cryptography…; If shared-key cryptography were…

1. If it is a shared-key cryptographic system; If shared-key cryptography is used

1. If shared-key cryptography…; When using shared-key cryptography…