Given two prime number character strings (p and q), generate the RSA public and private keys (n and d) with e = 65537. The more difficult part is doing this without the use of symbolic numbers. Example: p = '3355335697481001330501721', q = '5955344080483688912855719' n='19982178584029090861856118769095354822153154192399' d='3270348772331599380262578849367006078599068947553'
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I get different results for d in test cases 2, 3, and 4 (in particular, d=929660805638728623653 for test case 2).
If I understand correctly, we should have mod(d*e,phi)=1, where phi=(p-1)*(q-1). My answers seem to satisfy that condition, but test cases 2, 3, and 4 do not.
Could someone help me out with the modular inversion. I can't seem to get it to work for any large numbers. I've been stuck for a while
I think my main issue is that I cannot use the mod function with large numbers, what is a way around this?
@David Hill. Thanks, that worked a lot better for me
One should first consider if MATLAB is even adapted for these kinds of calculations. Still, I had a lot of fun.
Before I made my entry a few minutes ago, the smallest non-cheat solution was Tim's at 80. My second solution doesn't even include using the minor "ans=" cheat.