Cryptography

convert_uudecode() decodes a uuencoded string.

convert_uuencode() encodes a string using the uuencode algorithm.

Generates the cyclic redundancy checksum polynomial of 32-bit lengths of the $str.

crypt() will return an encrypted string using the standard Unix DES-based encryption algorithm or alternative algorithms that may be available on the system.

Generate a hash value (message digest)

Calculates the MD5 hash of $string using the « RSA Data Security, Inc. MD5 Message-Digest Algorithm » and returns that hash.

mhash() applies a hash function specified by $hash to the $data.

Calculates the sha1 hash of $str using the US Secure Hash Algorithm 1.