Desired New Data: count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo&waffle=liege In order to sign this new message, typically the attacker would need to know the key the message was signed with, and generate a new signature by generating a new MAC.
攻击者希望篡改的新数据: count=10&lat=37.351&user_id=1&long=-119.827&waffle=eggo&waffle=liege 为了给此新信息加上合法的签名，攻击者通常需要知道用于签名信息的密钥，并由此密钥生成一个新的MAC来作为新签名。