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Full disclosure |
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IT Security and Insecurity Portal |
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Making MD5 |
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Posted: Mon Jan 07, 2008 4:47 am |
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lmaoqwerty |
Regular user |
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Joined: Jan 06, 2008 |
Posts: 11 |
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To make an MD5, what would you need to do? |
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Posted: Mon Jan 07, 2008 8:42 am |
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pexli |
Valuable expert |
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Joined: May 24, 2007 |
Posts: 665 |
Location: Bulgaria |
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Re: Making MD5 |
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Posted: Mon Jan 07, 2008 10:31 am |
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waraxe |
Site admin |
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Joined: May 11, 2004 |
Posts: 2407 |
Location: Estonia, Tartu |
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Posted: Wed Jan 09, 2008 8:12 am |
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lmaoqwerty |
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Joined: Jan 06, 2008 |
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Can someone tell me why MD5 is a one way algorithm? |
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Posted: Wed Jan 09, 2008 3:54 pm |
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waraxe |
Site admin |
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Joined: May 11, 2004 |
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Location: Estonia, Tartu |
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lmaoqwerty wrote: | Can someone tell me why MD5 is a one way algorithm? |
It's oneway algorithm, becasue it's creators wanted to be that way. It's the essence of hashing. Because md5 hash has always fixed length and plaintext can be ANY lenght, then it's obvious even without knowing anything about cryptography, that DECODE operation is IMPOSSIBLE. Hash is inreversible. Cracking is just trial/error method and will not work against good passwords.
And one more thing - have a look at md5 algorithm details and/or C or java or whatever else implementation. It's interesting to see, what makes md5 hashing tick |
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