a. In hashing, what is the hash? b. Is encryption reversible? c. Is hashing reversible? d. Is hashing repeatable? e. When a hashing algorithm is applied, does the hash have a fixed length or a...

a. In hashing, what is the hash? b. Is encryption reversible? c. Is hashing reversible? d. Is hashing repeatable? e. When a hashing algorithm is applied, does the hash have a fixed length or a variable length? f. What is the hash size of MD5? g. What is the hash size of SHA-1? h. What is the hash size of SHA-256? i. Which hashing algorithms should not be used because they have been found to be vulnerable?