Called CMAC (cipher-based message authentication code), the algorithm can authenticate the source of digital data, such as messages sent over the Internet, and thus provide assurance that the data ...

The National Institute of Standards and Technology is recommending a new algorithm for authenticating digital data for federal agencies. Called CMAC (cipher-based message authentication code), the ...

Some of the very first secret codes were substitution ciphers--schemes for transforming the letters in a message to render them unreadable to anybody who didn't know the secret to decoding them ...