Hi Abhinav The extra time (2ms/bloc) comes from the hash procedure (sha1 in the example) that works with 64 bytes blocs
Rgs Pascal 2016-07-25 12:04 GMT+02:00 Somaraju Abhinav <[email protected]>: > Hi Pascal, > > > > Thanks for the information. Could you please explain what is > nb_bloc_512bits? > > > > Regards, > > Abhinav > > > > *From:* Ace [mailto:[email protected]] *On Behalf Of *Pascal Urien > *Sent:* Sonntag, 24. Juli 2016 11:51 > *To:* Michael StJohns <[email protected]> > *Cc:* [email protected] > *Subject:* Re: [Ace] on signature verification times for sec192r1 > > > > I fully agree... > > > > J3A081M can be found at 10$ over the WEB > > > > Futhermore this class of cheap device can process TLS or DTLS as > illustrated in > > > > https://tools.ietf.org/html/draft-urien-uta-tls-dtls-security-module-00 > > > > They could be used for numerous applications in the IoT > > > > Rgs > > > > Pascal > > > > > > 2016-07-23 23:59 GMT+02:00 Michael StJohns <[email protected]>: > > On 7/23/2016 11:10 AM, Pascal Urien wrote: > > Hi All > > > > J3A081M is a javacard device from NXP > > > > The micocontroller should be the P5CD081V1A, which comprises a crypto > processor > > > There's a number of these from a number of vendors. I'd actually look at > the A7xxx series of chips as they're designed to be embeddable. I've > become a big fan of javacard style solutions over the years. > > In any event, the number of relatively inexpensive public key crypto > accelerator chips (e.g. googl for "secure authentication chips") is greater > than zero and continues to climb. And for not a lot of money. Estimating > what from prices on Digikey, I'd think something less than $.50 for > Quantity large as of today and half that or less in 1-2 years as its gets > bundled into the "Swiss Army Knife" style of process (e.g. support for > wireless 900mhz plus ... plus ... plus ... plus security...) (google for > iot module secure element 900mhz for example). > > Later, Mike > > > > > > > The performances with the curve secp192r1 are the following (for ECDSA + > SHA1) > > > > Sign = 40ms + nb_bloc_512bits x 3.5 ms > > Verify = 60ms + nb_bloc_512bits x 3,5 ms > > > > > > By the way this chip has enough crypto ressouces for processing TLS or DTLS > > > > Rgs > > > > Pascal > > > > _______________________________________________ > > Ace mailing list > > [email protected] > > https://www.ietf.org/mailman/listinfo/ace > > > > > _______________________________________________ > Ace mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/ace > > > ________________________________________________________ The contents of > this e-mail and any attachments are confidential to the intended recipient. > They may not be disclosed to or used by or copied in any way by anyone > other than the intended recipient. If this e-mail is received in error, > please immediately notify the sender and delete the e-mail and attached > documents. Please note that neither the sender nor the sender's company > accept any responsibility for viruses and it is your responsibility to scan > or otherwise check this e-mail and any attachments. >
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