About MSDP fingerprinting

NetBackup uses a unique identifier to identify each file and each file segment that is backed up. The deduplication plug-in reads the backup image and separates the image into files. The plug-in separates the files into segments. For each segment, the plug-in calculates the hash key (or fingerprint) that identifies each data segment. To create a hash, every byte of data in the segment is read and added to the hash.

To ensure that data is encrypted and secured with the highest standards, NetBackup uses the AES encryption algorithm and SHA-2 fingerprinting algorithm beginning with the 8.1 release. Specifically, MSDP uses AES-256 and SHA-512/256.