The SIG-CBB is a solution that is used to provide data integrity and authenticity.
It mainly supports two features.
Signature Generation
Signature Verification

Signature CBB block diagram
The user application uses the Signature Generation feature for digital signature creation so that data integrity and authentication can be derived easily over a network when the data package (data file and the digital signature) is passed over the network.
The receiver will ensure the data integrity and authentication by using the Signature Verification feature. The receiver decrypts the digital signature to get the hash, also creates the hash of the data and then compares them. If both the hash matches, the data is transmitted without being tampered.