METHOD FOR SECURING A MULTI-POINT MULTIPLICATION OPERATION AGAINST SIDE CHANNEL ATTACKS
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-01-11
- Publication Date
- 2026-04-08
AI Technical Summary
Existing elliptic curve cryptography (ECC) protocols are vulnerable to side-channel attacks (SCA), particularly when performing multiple point multiplications using nonces, as demonstrated by J.-. Faugere et al in 2012 and J.Jancar et al in 2020, where retrieving a few bits of the nonce can lead to the exposure of the secret key through lattice basis reduction attacks.
A method involving multiplicative masking of scalar values with a shared random value (iRand) to protect nonces during multiple point multiplications, followed by a single unmasking operation to obtain the unmasked result, utilizing precomputed sums to minimize computation time and effort.
The method effectively secures ECC processes against side-channel attacks by protecting scalar values while maintaining efficient computation performance and minimizing operational costs.