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MD5 is referred to as an encryption, but your right, it is a hash, because MD5 is unable to ever be broken down into it's original text.

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Quote:

Originally posted by Locke
MD5 is referred to as an encryption, but your right, it is a hash, because MD5 is unable to ever be broken down into it's original text.

Unless of course you figure out it's cypher (don't know if that's the right word )

or just the way it encrypts

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from what i understand, md5 doesnt really encrypt anything - it makes a unique id for whats given it, and thats what makes it good as well as VERY hard to hack - ive never seen it done anyways besides the guess and test method.

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if you had a unique id wouldn't it change every time? But to have different combinations of 32(correct?) characters, eventaully all combinations would come up. I don't know if i make sense, but I can figure it out in my mind.

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Adman, it would take a computer forever to do that. Here's the possible number of combinations:

36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36^36

>>or just the way it encrypts
That is what I meant by cypher

I know it would take forever, but it theoretically possible that the situation i presented could happen.

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Quote:

if you had a unique id wouldn't it change every time? But to have different combinations of 32(correct?) characters, eventaully all combinations would come up. I don't know if i make sense, but I can figure it out in my mind.

Nope. First, if the string is ONE character or ONE THOUSAND it will still make a 32 bit strings. Also realize that the md5 is never taken from user, but rather a string that is md5ed to match a previous ones.

The only way to guess md5s is by guessing the string that was md5ed and md5ing guess untill you match.

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From rfc1321:

[i][The MD5 algorithm] takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given prespecified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.[/i]

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is MD5 crackable??

i heard its unbreakable