[OTR-dev] Extra symmetric key in Java implementations

Tommy C. Li tommycli at keepword.com
Thu Aug 16 02:44:19 EDT 2012


I wasn't able to find the referenced


function in the C library either. Has it been removed since 2008?

Is there any difference in the "extra" symmetric key compared to just generating 256 random bits and sending it to the counterparty inside a TLV?


On 08/15/2012 06:29 AM, Ian Goldberg wrote:
> On Sun, Aug 12, 2012 at 08:56:30PM -0700, Tommy C. Li wrote:
>> Hi,
>> It looks like there are two main Java implementations of OTR:
>> * java-otr from cypherpunks.ca
>> * otr4j at otr4j.org
>> Do either of them support the "extra" symmetric key referenced below?
>> http://thread.gmane.org/gmane.comp.security.otr.devel/895
> java-otr does not, though it would likely be straightforward to add.
>> I searched the code of both but didn't find it. Which Java
>> implementation is generally better maintained and recommended to be
>> used?
> We haven't had a java-otr maintainer in a little while now.  I'd be
> happy to hear from a volunteer.  ;-)
> Thanks,
>     - Ian
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