CompTIA Security+ SY0-701 Practice Question

This is an instance of Digital signature forgery, where the attacker has created fraudulent digital signatures to authorize transactions, typically by finding a way to replicate the signature creation process without access to the legitimate private key. Message digest tampering would involve altering the actual content of the message which is then covered by a signature or MAC, rather than forging a signature itself. Repudiation attacks involve denying the performance of an action in a communication process, not forging signatures. Lastly, cryptanalysis refers to the method of analyzing and breaking cryptographic securities, not specifically creating forged signatures.