Computing device processing expanded data

    公开(公告)号:US11528123B2

    公开(公告)日:2022-12-13

    申请号:US16625529

    申请日:2018-06-20

    IPC分类号: H04L9/08 H04L9/00 G06F13/40

    摘要: The present invention relates to a computing device for executing a first cryptographic operation of a cryptographic process on useful input data, said computing device comprising a first processor, a second processor and a selection circuit wherein: —said selection circuit is configured: —for receiving, from an input bus, expanded input data obtained by interleaving dummy input data with said useful input data, —for determining positions of the dummy input data in said expanded input data, —and for extracting said dummy input data and said useful input data from the expanded input data based on said determined positions, —said first processor is configured for executing said first cryptographic operation of said cryptographic process on said extracted useful input data to obtain useful output data, —said second processor is configured for executing a second operation on said extracted dummy input data to obtain dummy output data, said computing device being configured for having said operations executed such that leakage generated by said first cryptographic operation is jammed by leakage generated by the second operation.