Error detection for encryption or decryption keys

An electronic device comprising a processor and a memory, and adapted to implementing a method for error detection of an encryption or decryption key, wherein a first data element corresponding to the encryption or decryption key is not stored and made accessible in the memory and is divided in N second data elements independent from the first data element, each second data element being stored in the memory, and a result of an application of a XOR logic function to the N second elements being equal to the first data element,

• wherein an image of the first data element by a cyclic redundancy check function linear with respect to the XOR logic function is stored in the memory, and
• wherein the method comprises determining, by at least the processor, whether the image of the first data element by the cyclic redundancy check function is equal to an application of the XOR logic function to the images of N second elements by the cyclic redundancy check function.

A non-transitory computer-readable medium storing content that cause one or more processors to implement a method for error detection of a data element, wherein a first data element is not stored and made accessible in the computer-readable medium and is divided in N second data elements independent from the first data element, each second data element being stored in the computer-readable medium, and a result of an application of a XOR logic function to the N second elements being equal to the first data element,

• wherein an image of the first data element by a cyclic redundancy check function linear with respect to the XOR logic function is stored in the computer-readable medium, and
• wherein the method comprises determining, by the one or more processors, whether the image of the first data element by the cyclic redundancy check function is equal to an application of the XOR logic function to the images of N second elements by the cyclic redundancy check function.