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IT Security and Insecurity Portal |
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Short Email HASH for bounce messages |
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 Posted: Mon Jan 19, 2009 7:35 pm |
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| tinman |
| Active user |
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| Joined: May 11, 2008 |
| Posts: 37 |
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Is anyone really good at working out how a hash may have been put together?
<btv1==270870ea5a6==someone@somewhere.invalid>
Now we think the 270 means '7 days' with '269 meaning 6 days etc' and this is the time the link is valid. It's this bit: 870ea5a6 that is getting us.
There is a 'secret phrase' of 12345 used to create it - but this may just be salt for use on some other constant. No matter how long this phrase gets, the hash stays the same length - that's for sure.
Anyone got any idea what kind of pattern created this? It's commonly used in anti-spam invalid bounce systems. I have a feeling it may make use of openssl crypts |
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