This is solved by extending the constant time calculation principle to the CPU instruction level. Easier said than done, but probably only really necessary on HSMs or smart cards.
On a side note, the Computerphile[0] YouTube channel has an endlessly fascinating variety of computer science, theory, and history videos. A related channel that is equally worth following is Numberphile[1].
On a side note, the Computerphile[0] YouTube channel has an endlessly fascinating variety of computer science, theory, and history videos. A related channel that is equally worth following is Numberphile[1].
[0] https://www.youtube.com/@Computerphile/videos
[1] https://www.youtube.com/@numberphile/videos