Cryptographic data-processing method

摘要

The method involves randomly generating multiplicative parts (210), and successively applying each generated part during corresponding iterations by multiplying current additive parts of secret data (215) with the multiplicative part corresponding to the current iteration. The current additive parts are added (230) during final iteration for a third party multiplicative part. A random variable (Uki) is generated (220) and introduced (225) into the additive parts during current iteration to obtain random additive parts constituting the current additive parts for a following iteration. An independent claim is also included for a device for cryptographic processing of secret data.