Security

o6: Based on MD5 hash algorithm, Mi required 12 blocks and padding size is 8 bits. M2 required 13 blocks and padding size is 480 bits. If M, and 2 are combined in a single file called M3. Find M size. (2 Points) 7: Based on RSA digital signature, find the difference between ExR(M) and ExR(H(M). H: hash, M: message, KR: private key, and E: encryption (2 Points) Q8: Assume that the password length is 8, and the password may contain lowercase, uppercase, hexadecimal numbers and 20 special characters Find the total number of required attacks by brute force. (2 Points)