Q: Is it possible to make a file get an arbitrary MD2/MD4/MD5/MD6/SHA1/SHA2/SHA3, or the same hash as another file? A: No. Q: Can one create 2 different files with the same hash? A: With MD5, in a few seconds on a standard computer. With SHA1, it's possible but not practical for end-users (Complexity: 2^61.2 Price: $11k). Q: Can one make 2 different files get the same hash by appending stuff? A: W