Re: SHA1 Question

From: Mxsmanic (mxsmanic_at_hotmail.com)
Date: 03/31/05 

Date: Thu, 31 Mar 2005 06:35:17 +0200

Igor Tebelev writes:

> Suppose I have some unknow sequence of 7 bytes.
> Those bytes are encrypted using SHA1 which produces 20 bytes hash value
> Of those 20 bytes first 12 are known.
>
> So, the question is: having first 12 bytes of SHA1 result is there anyway to
> find original 7 bytes sequence used to produce that SHA?

No. 

-- 
Transpose hotmail and mxsmanic in my e-mail address to reach me directly.

Relevant Pages

  • Re: SHA1 Question
    ... "Igor Tebelev" writes: ... > find original 7 bytes sequence used to produce that SHA? ... Brute force ... That would be a total security failure of SHA. ...
    (sci.crypt)
  • Re: Summary of Bit-Level SHA Discussion
    ... If I tell you to do it as a sequence of bits, ... Many command-line digest ... The bit-string specification used in the SHA standard is completely ... as are the details of packing input bit-strings into blocks ...
    (sci.crypt)
  • Re: SHA1 Question
    ... > Suppose I have some unknow sequence of 7 bytes. ... > find original 7 bytes sequence used to produce that SHA? ... Someone will correct me if I'm wrong, but AFAIK, brute force is the ...
    (sci.crypt)