Back to results
US 2006/0125664 A1Published application
Masking of binary words processed by an integrated circuit
AssigneeSTMicroelectronics S.r.l.
InventorsPierre-Yvan Liardet, Yannick Teglia
Life of this patent
Estimating the term…
Abstract
A method and a circuit for masking a digital word by application of a random bijection, including applying at least one first operation including selecting a non-disjoint subset of the word having its position and size depending on a first random quantity, and assigning to each bit of the subset, the state of the bit having a symmetrical position with respect to the middle of the subset, to obtain a masked digital quantity.
Claims12
A method for masking a digital word by application of a random bijection, comprising applying at least one first operation (35) comprising:
- selecting a non-disjoint subset of said word having its position and size depending on a first random quantity;
- and
- assigning to each bit of the subset the state of the bit having a symmetrical position with respect to the middle of the subset, to obtain a masked digital quantity.
Dependencies are inferred from the claim text.