Question: 11. Bob designed a new scheme to detect whether a message is modified by an attacker (protecting data integrity). The scheme is to append to

11. Bob designed a new scheme to detect whether a message

11. Bob designed a new scheme to detect whether a message is modified by an attacker (protecting data integrity). The scheme is to append to each message a SHA-256 hash of that message. Explain the vulnerability of Bob's desigrn

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