[OTR-dev] Decrypting messages from an old OTR conversation

Evan Schoenberg evan.s at dreskin.net
Mon Feb 27 13:40:20 EST 2006

I have a user bugging me about this, and I'm not sure how to respond.

The problem: some services support serverside offline messaging.   
Yahoo and ICQ, for example.  If Bob is in an encrypted conversation  
with Alice, and Alice signs offline, the service still allows Bob to  
message Alice, storing the (encrypted) message on the server for  
delivery when Alice next signs online.  Bob knows that Alice has the  
information for decrypting his message, since they've been  
communicating previously...

So Alice signs on a day later... but she can't read the message,  
since the conversation has since ended.  She receives:
The encrypted message received from Bob is unreadable, as you are not  
currently communicating privately.

Any thoughts?

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