Microchip Technology Incorporated
Authentication of files

Abstract:

Methods of authenticating a file are disclosed. A method may include selecting, via an identifier, a subset of data segments of a file. The method may also include executing, via a microcontroller, a cryptographic function on only the subset of data segments of the file to generate a digest. Further, the method may include generating, via the microcontroller, an authenticator based on the digest and a private key. The method may also include conveying the file, the identifier, and the authenticator to a cryptography element. In addition, the method may include executing, via the cryptography element, the cryptographic function on the subset of data segments of the file to generate a second digest. Furthermore, the method may include authenticating, via the cryptography element, the file via verification of the authenticator based on the second digest and a public key of the microcontroller.