RE: MD5 Vs SHA1

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Alpha Cpt MaDvLaD

MD5 and SHA1 are both based on principles of the MD4 message digest algorithm which was developed be Ronald Rivest of MIT. However, weaknesses in MD4 were published in 1991 so Ronald Rivest designed a new one, MD5 which was the succeeding one, as a secure replacement of MD4.

SHA1-1:
Output: 160 bits
Input: 512 bit message chunks
Number of steps: 80 (4 rounds of 20)
Operations: bitwise AND, OR, XOR, complement and cyclic shift

MD5:
Output: 160 bits
Input: 512 bit message chunks
number of steps: 64 (4 rounds of 16)
Operations: same as SHA but runs two algorithms in parallel whose outputs are combined after each round.

Note: In 1996, H. Dobbertin announced a collision of the compression function of MD5 bringing the community to recommend switching to a replacement, such as SHA-1, SHA-2 or RIPEMD160.

I hope the given information helps you.

Replies:

MD5 Vs SHA1 - Rec slim2505 2008-06-20 01:24:44
- >RE: MD5 Vs SHA1 - Alpha Cpt MaDvLaD 2008-06-29 17:54:29 <
  - maddie :) -nt- - Alpha LtKer Rae 2008-06-30 18:03:21
  - wtf... madvlad??!? ltns mate-nt- - Gamma Lt Icydemon 2008-06-30 08:27:55
- RE: MD5 Vs SHA1 - Beta Maj SAJChurchey 2008-06-20 01:50:58

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Subject:
Message:	On 2008-06-29 17:54:29, MaDvLaD wrote >MD5 and SHA1 are both based on principles of the MD4 message digest algorithm which was developed be Ronald Rivest of MIT. However, weaknesses in MD4 were published in 1991 so Ronald Rivest designed a new one, MD5 which was the succeeding one, as a secure replacement of MD4. > > >SHA1-1: >Output: 160 bits >Input: 512 bit message chunks >Number of steps: 80 (4 rounds of 20) >Operations: bitwise AND, OR, XOR, complement and cyclic shift > >MD5: >Output: 160 bits >Input: 512 bit message chunks >number of steps: 64 (4 rounds of 16) >Operations: same as SHA but runs two algorithms in parallel whose outputs are combined after each round. > >Note: In 1996, H. Dobbertin announced a collision of the compression function of MD5 bringing the community to recommend switching to a replacement, such as SHA-1, SHA-2 or RIPEMD160. > >I hope the given information helps you.
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