The difference we're talking about is 16 bytes, ~20 when base64 encoded. Is that enough to be a significant difference for you?
On Thu, May 30, 2013 at 3:25 AM, Ludwig Seitz <[email protected]> wrote: > On Wed, 2013-05-29 at 16:34 -0700, Jim Schaad wrote: > > <chair> > > > > > Method #1 > > > > Key Agreement Secret --(KDF)--> Key Encryption Key --(Key Wrap)--> > Content > > Encryption Key > > > > Method #2 > > > > Key Agreement Secret --(KDF)--> Content Encryption Key. > > > > [...] question: > > > > I have a use case where doing Method #2 is the correct method or a much > > better method. If this is a true statement, please provide the use case > to > > use. > > I think I have a use case where method #2 is better. I'm working on > processing JWE objects on constrained devices and transferring them over > low capacity networks. If my understanding of method #2 is correct, it > would leave the JWE Encrypted Key empty, thus reducing the size of the > JWE message. > I therefore think method #2 is preferable for this use case, since it > saves both bandwidth and RAM on the constrained device. > > Regards, > > Ludwig Seitz > > > -- > Ludwig Seitz, PhD > SICS Swedish ICT AB > Ideon Science Park > Building Beta 2 > Scheelevägen 17 > SE-223 70 Lund > > Phone +46(0)70-349 92 51 > http://www.sics.se > > _______________________________________________ > jose mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/jose > >
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