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This is an old revision of this page, as edited by Crabpot8 (talk | contribs) at 07:43, 10 March 2020 (→Acronym MD: point out potentially incorrect impl). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

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Is Pseudocode Wrong?

I'm no expert, but I coded up this part of the pseudocode and it appears to be incorrect (multiple off-by-one issues). Using `ceil` instead of `floor` results in numbers that match the pre-calculated table. 

// Use binary integer part of the sines of integers (Radians) as constants:
for i from 0 to 63 do
   K[i] := floor(232 × abs (sin(i + 1)))
end for

Could anyone help confirm/deny the pseudocode accuracy?

Crabpot8 (talk) 07:43, 10 March 2020 (UTC)[reply]

Acronym MD

Acronym MD The following text was added to the lead by NetBlues on 12 January 2017 (diff):

The MD5 hash function receives its acronym MD from its structure using Merkle–Damgård_construction.

Computer people are well known for enjoying humor and there well may be a backronym explanation for what "MD" means, but given MD4 (which has the same unsourced claim diff) and RFC 1321 a good source for that assertion is needed. The text should be removed from here and MD4 if no reference is available. Johnuniq (talk) 23:46, 13 February 2017 (UTC)[reply]

The acronym MD actually refers to the term Message Digest, rather than Merkle–Damgård_construction. While Merkle–Damgård_construction is used in MD5, I could not substantiate that it was used in any previous iterations of MD* algorithms, leading me to now believe that there is no correlation between the names, and the acronyms for each are a coincidence. My original assertion is withdrawn. NetBlues (talk) 15:27, 20 September 2017 (UTC)[reply]

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Figure wrong

The figure uses the part of the message Mi.

But in the code and the RFC it is Mg with g either i, (5i + 1) mod 16, (3i + 5) mod 16 or (7i) mod 16.

Additionally the rotation of inside the figure should be si an not s only

I cannot correct the wrong Mi in figure but maybe someone else can.--158.64.4.213 (talk) 10:10, 15 March 2019 (UTC)[reply]

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