The MD4 message-digest algorithm is specified by RFC 1320 [http://www.ietf.org/rfc/rfc1320.txt] 
This algorithm takes an arbitrary quantity of data and generates a 128-bit message digest
from the input. The MD4 algorithm is faster but potentially weaker than
the related [MD5] algorithm [http://www.ietf.org/rfc/rfc1321.txt].

A tcl-only implementation of MD4 is now part of [tcllib]. Documentation can be found at http://tcllib.sourceforge.net/doc/md4.html

'''Examples'''
 % package require md4
 1.0.4
 % base64::encode [md4::md4 {}]
 MdbP4NFq6TG3PFnX4MCJwA==
 % md4::md4 -hex {}
 31D6CFE0D16AE931B73C59D7E0C089C0
 % base64::encode [md4::md4 a]
 veUssx3jPkYkXgX729b7JA==
 % md4::md4 -hex a
 BDE52CB31DE33E46245E05FBDBD6FB24

Note that by default, the [[md4::md4]] command produces ''binary'' output strings. The '''-hex''' option makes it produce output in a human-readable format, and it is also quite common to use [base64]-encoding as that is more compact.
----

See also [md5], [sha1], [sha2], [RIPEMD], [ntlm]

[[ [Category Cryptography] | [Category Package], subset [tcllib] ]]