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Results tagged with authentication
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user 21765
Authentication is successfully validating that an entity you are communicating with is actually who they claim to be. The entity typically demonstrates who they are by showing they possess a secret that only they could know.
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CBC-MAC: is it secure to authenticate a fixed length ciphertext?
Suppose I have a fixed-length arbitrary ciphertext.
To authenticate such ciphertext:
I generate a random AES Key $K_{auth}$.
Then I compute the CBC-MAC Tag of the ciphertext with $K_{auth}$.
Finall …
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