The algorithm used to calculate an employee's pay depends on that column's value, because pay calculation for hourly employees differs from pay calculation for salaried employees.
A hash is very much like a fingerprint and the hash algorithm is constructed so that the smallest change in the source produces a completely different and unpredictable hash value.
哈希非常类似于指纹，通过构建哈希算法，即使是源中的最小更改也会产生完全不同和不可预知的哈希值。
3
It then passes the extracted Base 64 encoded cipher value, the decryption key, and the algorithm name to a method named decrypt (examined in Cryptography).