The '''[http://www.rfc-editor.org/info/rfc1320%|%MD4]'''  message-digest algorithm takes input of arbitrary length and produces a 128-bit "fingerprint" or "message digest" of the input. 



** Description **

The MD4 algorithm is faster but potentially weaker than
the related [MD5] algorithm. 

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



** Examples **

======none
% 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
======

By default, `md4::md4` 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]:   

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