Download Cryptographic Hardware and Embedded Systems — CHES 2001: by Ross Anderson (auth.), Çetin K. Koç, David Naccache, PDF

By Ross Anderson (auth.), Çetin K. Koç, David Naccache, Christof Paar (eds.)

These are the court cases of CHES 2001, the 3rd Workshop on Cryptographic and Embedded platforms. The ?rst CHES Workshops have been held in Massachusetts, and this was once the ?rst Workshop to be held in Europe. there has been loads of submissions this 12 months, and in reaction the technical application used to be prolonged to two half days. As is obvious by way of the papers in those complaints, many glorious submissions have been made. settling on the papers for this year’s CHES was once no longer a simple activity, and weregretthatwehadtorejectseveralveryinterstingpapersduetotheac l kof time. there have been sixty six submitted contributions this yr, of which 31, or 47%, have been chosen for presentation. If we glance on the variety of submitted papers at CHES ’99 (42 papers) and CHES 2001 (51 papers), we become aware of a gentle raise. We interpret this as a continual desire for a workshop sequence which mixes conception and perform for integrating robust security measures into glossy communications and computing device purposes. as well as the submitted contributions, Ross Anderson from Cambridge college, united kingdom, and Adi Shamir from The Weizmann Institute, Israel, gave invited talks. As in earlier years, the focal point of the workshop is on all features of cryp- graphichardwareandembeddedsystemdesign.Ofspecialinterestwerecont- butions that describe new equipment for e?cient implementations and high-speed software program for embedded structures, e.g., shrewdpermanent playing cards, microprocessors, DSPs, and so on. CHES additionally remains to be an immense discussion board for brand new theoretical andpractical?ndingsintheimportantandgrowing?eldofside-channelattacks.

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Olivier K¨ ommerling and Markus Kuhn. Design principles for Tamper-Resistant Smartcard Processors. In USENIX Workshop on Smartcard Technology, Chicago, Illinois, USA, May 1999. 4. S. Rankl and W. Effing. Smart Card Handbook. John Wiley & Sons, 1999. 5. Derek Robinson. A Course in the Theory of Groups. Number 80 in GTM. Springer Verlag, 1991. 6. Adi Shamir. Assassinating SASAS. Rump session of Crypto’2000. Random Register Renaming to Foil DPA D. L. P. uk Abstract. Techniques such as DPA and SPA can be used to find the secret keys stored in smart-cards.

N − 1}m+1 σK −→ (σK (i1 ), . . , σK (im+1 )) is injective. Informally, the degree of freedom is equal to the minimum number of pairs (i, σK (i)) we have to fix to determine uniquely σK . Note that this does not mean that this suffices to determine K, as the map from {0, 1}k to Sn might not be injective, but in our context, the secret key is completely recovered as soon as σK is known. From a practical standpoint, this definition implies also that we should look for keyed permutations with a degree of freedom as high as possible.

G. −P (x, y) = P (x, x + y)(the add and subtract operations are basically the same), they aren’t distinguishable in the power trace. The difference of add (subtract) and double depends on the underlying number field, and the used coordinates. 1, in GF (2m ) with affine coordinates, for both add and double operation, 1 inversion, 2 multiplications and 1 squaring is needed. We consider now some possible scenarios for a power attack : – SPA case : Suppose one has an implementation were the distinction between double and add (subtract) is possible with a single measurement (this could be the case when working with projective coordinates).

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