I get different results for d in test cases 2, 3, and 4 (in particular, d=929660805638728623653 for test case 2).
This was my first Cody problem and I had a mistake in the assert within the test cases. I fixed the problem. Previously the assert was looking for [n,d] combined into a single character array. I have tested the test cases and they are correct. You should use the Euclidean algorithm.
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.
Tim, you are absolutely correct. Thanks for the comment. I fixed the test cases.
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?
look at importing java biginteger
@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.
Googling can supplant programming sometimes.
Find the alphabetic word product
Clean the List of Names
Back to basics 9 - Indexed References
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Insert zeros into vector
Convert Thermocouple output voltage (in mV) to Temperature (in C)
Montgomery Reduction Algorithm (REDC)
Inverse Number Theoretic Transform (iNTT)
AES MixColumns() Transformation
Find the treasures in MATLAB Central and discover how the community can help you!
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office