Dear Art, May I give feedback on an old action item regarding the preference for ECDSA vs. DSA. I hope that T-Mobile's position statement is not too late.
T-Mobile favors ECDSA. DSA has no advantage regarding speed and memory consumption against the classic RSA. ECDSA improves the security level. Please note that ECDSA supports prime field cases and binary field cases. Especially the binary field cases are covered by patents. Due to the fact that different parameters for the elliptic curves can be used or are standardized, these parameters are relevant too. The NIST recommends fifteen elliptic curves (five prime curves and ten binary curves, see also http://en.wikipedia.org/wiki/Elliptic_curve_cryptography). The so-called Brainpool curves are preferred in Germany (see also http://www.ietf.org/internet-drafts/draft-lochter-pkix-brainpool-ecc-03.txt). Best Regards, Rainer ************************************* T-Mobile International Terminal Technology Rainer Hillebrand Head of Terminal Security Landgrabenweg 151, D-53227 Bonn Germany +49 171 5211056 (My T-Mobile) +49 228 936 13916 (Tel.) +49 228 936 18406 (Fax) E-Mail: rainer.hillebr...@t-mobile.net http://www.t-mobile.net This e-mail and any attachment are confidential and may be privileged. If you are not the intended recipient, notify the sender immediately, destroy all copies from your system and do not disclose or use the information for any purpose. Diese E-Mail inklusive aller Anhänge ist vertraulich und könnte bevorrechtigtem Schutz unterliegen. Wenn Sie nicht der beabsichtigte Adressat sind, informieren Sie bitte den Absender unverzüglich, löschen Sie alle Kopien von Ihrem System und veröffentlichen Sie oder nutzen Sie die Information keinesfalls, gleich zu welchem Zweck. T-Mobile International AG Aufsichtsrat/ Supervisory Board: René Obermann (Vorsitzender/ Chairman) Vorstand/ Board of Management: Hamid Akhavan (Vorsitzender/ Chairman), Michael Günther, Lothar A. Harings, Katharina Hollender Handelsregister/Commercial Register Entry: Amtsgericht Bonn, HRB 12276 Steuer-Nr./Tax No.: 205 / 5777/ 0518 USt.-ID./VAT Reg.No.: DE189669124 Sitz der Gesellschaft/ Corporate Headquarters: Bonn
