Cryptology Definition and 11 Threads

My lecturer said that the cryptosystem one-time pad, has a weakness which is when it is subject to frequency analysis. But after him trying to explain why that is a weakness of this system I am still unable to see why. Because the frequency of letters is completely irrelevant to the structure of...

The summary abstract (describes the method) and full paper are linked. Summary abstract https://eprint.iacr.org/2021/232.pdf

Hey guys, I just bought the book Elementary Cryptanalysis: A Mathematical Approach by Abraham Sinkov, yet before I start it, I would like to know if there are any prerequisites I should know about as I am 16 and I still haven't even taken all of high school mathematics although I am self...

I'm a 17 yo high school student, and my country has this system where you take a "strand" leaning towards your future career in the last two years of high school, so mine is STEM. I'm planning on taking mathematics and maybe a CS minor in college, because I want to become a cryptologist, but...

bapowell submitted a new PF Insights post Perfect Secrecy and the Unbreakable Cipher Continue reading the Original PF Insights Post.

Homework Statement compute 59x +15 \equiv 6 mod 811 Homework Equations The Attempt at a Solution 59x \equiv -9 mod 811 I really don't know hoow to do from here.

Homework Statement Let n be a positive integer. Consider the congruence equation 59x + 15 congruent to 6 mod n For this equation, a solution x exits. Why? Homework Equations The Attempt at a Solution there is a k such that (59x +15) - 6 = kn (59x +15) - kn = 6 59x - kn = 6 - 15 59x - kn =...

[b]1. This is a problem involving public key cryptography [b]2. 16^31 is congruent to 081 (mod 247) [b]3. I would first evaluate 16^31 and the divided by 247 to find the remainder. I know how to work with congruences, but 16^31 is a very huge number I don't know how to evaluate it into...

http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher I have comprehended how to make a cod using this method. I understand frequency analysis for the most part. But does anyone know how the formula for decoding a vigenere code work. I have read that part of the wikipedia article many times...

Here's a simple code I made in math class. 46 46 48 26 34 24 05 20 24 38 12 02 11 19 20 14 28 46 26 27 34 23 26 00 34 20 22 17 24 18 24 16 46 Solve the code! Have fun!

I was assigned to decrypt this cipher text: EWPW DRAPO MGTGT EXVAH RPSWI LSFUN RZVSE FOIWJ NYOU MHSER EFBMB VANHA LOOXI VPBIF FIFMA BFGRH GARE TLKLF NZQXQ DWGKP UWNWQ QFRZL VROOP UGBQQ HVKS CDOPW LSGTE JMFSE MLZMD TNDED VVGRO UUMLV NLHA KWASO ITAPR DTBBG CHDSH TNSFM NGWMF CASWM...