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What is an Authentication Code?

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An authentication code is an identifier that is used to verify identity or validate the authenticity of data such as messages. They are often hashcodes that are designed to be infeasible to guess.

Example

It is common to authenticate an entity by asking them to decrypt a message encrypted with the public key found in their digital certificate. The message typically includes a authentication code. If the entity sends back the correct authentication code, you know that they are in possession of the private key corresponding to the public key in the digital certificate.
Overview: Authentication Code
Type
Definition
An identifier that is used to verify identity or the authenticity of data such as messages.
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Encryption

This is the complete list of articles we have written about encryption.
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Cryptography
Hashcode
Key Stretching
Keys
Nonce
Pepper
Private Key
Random Seed
Salt
Plaintext
Pseudorandom
Public Key
Public Key Encryption
Strong Password
Symmetric Encryption
More ...
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