Viewing Single Post From: Double cipher challenge

Viewing Single Post From: Double cipher challenge
catish10	Aug 12 2007, 07:51 PM
Just registered Posts: 11 Group: Members Member #1,158 Joined: July 29, 2007	hi, Just had an e-mail come through from the person with the challenge "The cipher is multiple layered, you are in the right track! it is not easy to crack so the hint in the website will help you" this was in response to - "I thought I'd give you an update! I've been working on it for a > while, but other than working out the IC I cant get very far! I have > experimented by creating my own cipher encoded first with a keyed > substitution cipher and then encoded with Vigenere to see if there are > any patterns that show through to the IC. I managed to bring out part > of my keyword using the single letters (A and I) even though they were > encoded with the keyed sub. but that was because they were the same > (all I's even though in the final code they were actually three > different letters!) I'm struggling in how to work out what ciphers > were used. If this supposed to be something relatively easy then I > would have guessed a keyed substitution followed by something else. In > further experiments, a code first encoded with a Caeser and then > Vigenere, gives the same final cipher text as if it were encoded with > Vigenere and then a Caeser cipher. Please can you point me in the > right direction? I am relatively new to this, I have only really been > experimenting with cryptography for about a year. I can break Vigenere > ciphers quite easily, but I have no idea with multiple layered > encryption!" Dont know if this helps anyone! Perhaps I should have placed this in the challenge section! Michelle


Double cipher challenge · Challenges