David Jablon
Integrity Sciences, Inc.
                
                   


Burt Kaliski
Chair, IEEE P1363
RSA Laboratories East
20 Crosby Drive
Bedford, MA  01730

May 24, 1999


Burt,

This is a response to your letter requesting information about patent
coverage for P1363.

Integrity Sciences has filed patent applications for methods related to
key agreement schemes described in the current IEEE P1363 standard, and
for key agreement methods under consideration for inclusion in P1363a.

Specifically, our work relates primarily to password-authenticated key
agreement protocols such as those described in our P1363 submission of the
paper:

        D. Jablon, Strong Password-Only Authenticated Key Exchange,
        Computer Communication Review, ACM SIGCOMM, vol. 26, no. 5,
        pp. 5-26, October 1996.

We do not believe that our patents will cover all uses of any schemes
described in the current IEEE P1363 standard.  However, these patents may
cover specific uses of the P1363 key agreement schemes and the value
derivation primitives that detect small subgroup confinement.

This letter confirms our position that if and when such patents are granted
to Integrity Sciences, we will gladly provide upon request a non-exclusive
license for the use of such patents in utilizing methods in the IEEE P1363
and P1363a standards with reasonable terms and conditions.  Anyone
interested in information about our methods, patents, and licenses should
contact Integrity Sciences at:

	Integrity Sciences, Inc.    web:   www.IntegritySciences.com
	                            email: dpj@IntegritySciences.com
	                            phone: +1 508 898 9024

This letter does not grant to the IEEE any rights to Integrity Sciences'
patents, copyrights, trademarks, or other intellectual property.

				Sincerely,

				David Jablon
				President, Integrity Sciences, Inc.