Hi Pascal, I guess you are saying that the performance of the verify operation is 60ms + the hash needed over the actual message (which is 3.5 msec for a 64 byte block).
In another paper I have seen that some hardware crypto chips have a fairly slow interface and that has to be taken into account as well. Is this an issue with this smart card? What is your experience there? Ciao Hannes On 07/25/2016 12:28 PM, Pascal Urien wrote: > 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] <mailto:[email protected]>>: > > Hi Pascal,____ > > __ __ > > Thanks for the information. Could you please explain what is > nb_bloc_512bits?____ > > __ __ > > Regards,____ > > Abhinav____ > > __ __ > > *From:*Ace [mailto:[email protected] > <mailto:[email protected]>] *On Behalf Of *Pascal Urien > *Sent:* Sonntag, 24. Juli 2016 11:51 > *To:* Michael StJohns <[email protected] > <mailto:[email protected]>> > *Cc:* [email protected] <mailto:[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] > <mailto:[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] <mailto:[email protected]>____ > > https://www.ietf.org/mailman/listinfo/ace____ > > __ __ > > > _______________________________________________ > Ace mailing list > [email protected] <mailto:[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. > > > > > _______________________________________________ > Ace mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/ace >
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