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Md5 Question
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A friend of mine an i were wondering the following
If there is really a one in 20 million chance of and two files having the same MD5 hash
in theory, would it not be possible to recreate a file from the MD5 hash itself?
I understand the time involved in doing this through the "rainbow tables" method, not to mention the processing power.
but with new processors coming out with 8 cores or so....
you see where this is going...
If there is really a one in 20 million chance of and two files having the same MD5 hash
in theory, would it not be possible to recreate a file from the MD5 hash itself?
I understand the time involved in doing this through the "rainbow tables" method, not to mention the processing power.
but with new processors coming out with 8 cores or so....
you see where this is going...
Do you geek alone?
<<TimmCo>> Custom Computers
~Executive
<<TimmCo>> Custom Computers
~Executive
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in theory, would it not be possible to recreate a file from the MD5 hash itself?
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its not possible though
thats not what a hash is. A hash is a totally arbitrary thing, its meaningless without a context with which to apply it to.
if we are going to be really technical, an MD5Sum isnt a type of hash at all, its a checksum, but the same thinking applies
thats not what a hash is. A hash is a totally arbitrary thing, its meaningless without a context with which to apply it to.
if we are going to be really technical, an MD5Sum isnt a type of hash at all, its a checksum, but the same thinking applies
Last edited by jbennet; Mar 30th, 2009 at 11:41 pm.
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Junior Poster
Um, yes, it is a hash. Is hash not a synonym of checksum?
no hashes have a completely different meaning when used in the context of databases
http://en.wikipedia.org/wiki/Hash_function
The first few paragraphs of this explain it
http://en.wikipedia.org/wiki/Hash_function
The first few paragraphs of this explain it
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Junior Poster
The differences explained there are a pedantic wikipedian classification system. Hashes, checksums, and cryptographic hashes are all the same thing and are all designed for the same general purpose. The only difference between a "good hash function" and a "good checksum function" and such is that different traits are valued more intensely.
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