[jdev] Jabberd 2 project

[Remy HAREL]

Matthias Wimmer wrote:

>Salut Remy!
>
>Remy HAREL schrieb am 2004-04-30 17:13:04:
>  
>
>>of XML stanzas between any two entities". So,  as we have many c2s, we 
>>have to add data in order to keep this order, and I would like to hash 
>>an jid (1024bits) to a MD5 word (128bits). It's better ( I think) and 
>>MD5 is already implemented in jabberd 2 project, that's why I choose 
>>MD5. Is it a bad choice accordind to you ?
>>    
>>
>
>A JID has up to 1024 B not 1024 b ;)
>
>If you want to use the hash to reduce the size, you might prefere MD5,
>that's true. SHA-1 would have 160 b.
>
>But infact this is an advantage. 128 b isn't considered enough anymore
>to prevent forced clashes (by users). So if you use it in a way that
>JIDs that map to the same hash don't break your implemenation it's fine.
>If clashing hashes break your implementation MD5 could be a problem for
>you as somebody that want to harm your server can create a second
>account that has the same hash value.
>
>BTW: The SHA-1 hash algorithm is implemented in jabberd2 (and jabberd14)
>as well: jabberd2/util/sha1.*
>
>
>A+
>  Matthias
>
>  
>
>------------------------------------------------------------------------
>
>_______________________________________________
>jdev mailing list
>jdev at jabber.org
>https://jabberstudio.org/mailman/listinfo/jdev
>  
>
Hi Matthias,

   Thanks, I'm working on this problem.

 Have a nice week,

-- 

Remy Harel - remy.harel at gicm.fr
G.I.C.M - Distributed Systems & IT
Linux Registered User #224740