Cryptanalysis

Sunday 26 July 2020, 18:27  #1
Cryptanalysis - Common Modulus
jam
jam
  • 99 posts

Hi,

I can verify the math stuff. I tested the values that are given by the calculations and i know it is working like a charm if i use my encrypted text.

At the end as output there is my decrypted text again. I do not know what is wrong with the messages which are obviously base64 encoded and there is more stuff behind. I got the inside of each message and made my calculations. Ok, there is an output but no plain text and no whatever.

Thx for scheduling things which are common...

Sunday 26 July 2020, 19:53  #2
Cryptanalysis - Common Modulus
jam
jam
  • 99 posts

Hi again,

Now i got the similar text that was sent, at least i think so.. Take care about calculating the zeros when decode the message from base64.
There are similarities in this obtained one with the first and second message, but still can not give up guessing. What a blame... :)


Monday 27 July 2020, 14:43  #3
Cryptanalysis - Common Modulus
jam
jam
  • 99 posts

Hi,

i got it. There are few ways, but the best one is the direct one.
Good luck,