| 4D REST digest | Longint | 2 | Internal algorithm of 4D, useful in the context of the On REST Authentication database method when you want to use your own list of users. | 
                | MD5 digest | Longint | 0 | Message Digest 5 algorithm. A series of 128 bits returned as a string of 32 hexadecimal characters. | 
                | SHA1 digest | Longint | 1 | Secure Hash 1 algorithm. A series of 160 bits returned as a string of 40 hexadecimal characters. | 
                | SHA256 digest | Longint | 3 | (SHA-2 family) SHA-256 is a series of 256 bits returned as a string of 64 hexadecimal characters. | 
                | SHA512 digest | Longint | 4 | (SHA-2 family) SHA-512 is a series of 512 bits returned as a string of 128 hexadecimal characters. |