Scalar multiplication in compressed coordinates in the trace-zero subgroup

September 13, 2017 Β· Declared Dead Β· πŸ› IACR Cryptology ePrint Archive

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Authors Giulia Bianco, Elisa Gorla arXiv ID 1709.04178 Category cs.CR: Cryptography & Security Citations 0 Venue IACR Cryptology ePrint Archive Last Checked 4 months ago
Abstract
We consider trace-zero subgroups of elliptic curves over a degree three field extension. The elements of these groups can be represented in compressed coordinates, i.e. via the two coefficients of the line that passes through the point and its two Frobenius conjugates. In this paper we give the first algorithm to compute scalar multiplication in the degree three trace-zero subgroup using these coordinates.
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