Challenge "Modified Vigenère Cipher" ¶
By: admin on Jan. 24, 2022, 11:56 a.m.
This cipher is a new take on the well-known Vigenère cipher. It has been
designed to fix its "brother's" weaknesses. Can you find another weakness?
By: silva on Feb. 25, 2022, 8:04 p.m.
At first sight this seems to be a fairly simple challenge, but the opposite is true. It is a really hard one.
I eventually managed to solve it, after 3 weeks trying several ways of attack and a lot of frustration.
In my opinion it should be a level 2 challenge, instead of level 1. Until today only 4 other people solved it, and probably more are still working on it. What do you think about the level? Looking forward to opinions of others. Silva
By: Theofanidis on June 3, 2022, 5:31 p.m.
Dear seafischer, Thanks for doing such a great work As sarah b silva has commented in a previous post, it is used - according to MTC3 policy (unless it has changed) - that when a challenge is upgraded or degraded, the points that were awarded before that time are rearranged accordingly. So i think that the first 5 solvers [Alain Collignon (vexilla72), Michael (FoM), sarah b (silva), George (Theofanidis) - me, and Dominik M. (Sgt. Pepper)], that solved it as a Level I should be awarded Level II points, as it happened for the next 2 solvers [George Lasry (george4096) and Dr. Peter Uelkes (RandyWaterhouse)]. Thanks in advance for having this into MTC3 consideration. Kind Regards, George Theofanidis.