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CTRSA
2005
Springer

New Minimal Weight Representations for Left-to-Right Window Methods

12 years 7 months ago
New Minimal Weight Representations for Left-to-Right Window Methods
For an integer w ≥ 2, a radix 2 representation is called a width-w nonadjacent form (w-NAF, for short) if each nonzero digit is an odd integer with absolute value less than 2w−1 , and of any w consecutive digits, at most one is nonzero. In elliptic curve cryptography, the w-NAF window method is used to efficiently compute nP where n is an integer and P is an elliptic curve point. We introduce a new family of radix 2 representations which use the same digits as the w-NAF but have the advantage that they result in a window method which uses less memory. This memory savings results from the fact that these new representations can be deduced using a very simple left-to-right algorithm. Further, we show that like the w-NAF, these new representations have a minimal number of nonzero digits. 1 Window Methods An operation fundamental to elliptic curve cryptography is scalar multiplication; that is, computing nP for an integer, n, and an elliptic curve point, P. A number of different algor...
James A. Muir, Douglas R. Stinson
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where CTRSA
Authors James A. Muir, Douglas R. Stinson
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