Method and device for securing an integrated circuit, in particular a microprocessor card

A method for reading data from a memory comprising:

• selecting a plurality of memory cells to be read, each memory cell supplying an electrical signal representative of a data value of the cell;
• routing the electrical signal to respective read circuits according to a routing rule;
• and
• modifying the routing rule between read cycles.

A method comprising:

• reading in parallel, using a plurality of read circuits, selected memory cells according to a rule for allocating electrical signals to the read circuits;
• supplying binary output signals from the read circuits, respectively, based on the reading;
• and
• applying a permutation to at least one part of the electrical signals to the read circuits and modifying the rule for allocating electrical signals to the read circuits, the rule being modified between successive reading cycles.