Random number generation based upon a random bit sourcing from one or more registers of a computer

A random number generation method implemented by means of a digital processor of a computer, comprising:

• responding to a function call processed by the digital processor in memory of the computer to produce a random number to an application circuit or software in the computer by processing computer program instructions by the processor within the computer, the instructions upon processing by the processor performing:
• a) searching an internal register of the processor, wherein content of the internal register is evolutive changing over time;
• b) extracting at a given time n bits from the register, n≥1;
• c) using the n bits extracted at step b) as bit(s) for forming a random number of N bits to be generated;
• d) repeating steps a) to c) until obtaining the N bits of the random number;
• e) providing the random number to the application circuit or software;
• and,
• f) before step b), selecting, by a random of pseudo-random process, the n bits of the register which will be extracted at step b), and/or of selecting, by a random of pseudo-random process, one register among a plurality of internal registers of the processor that may be potentially searched and selecting the n bits from the selected register, in particular selecting, by a random of pseudo-random process, at least one of the bits of the selected register.