Zgyzhs grnv ! :)

[Gottle of Geer]

...

[Zooey]

[JFT]

. What's a zgyzhs grnv?

[Tantum ergo]

Well, it looks Polish--is it?

[thechrismyster]

Plain: ABCDEFGHIJKLMNOPQRSTUVWXYZ
Cipher: ZYXWVUTSRQPONMLKJIHGFEDCBA

a substitution cipher - generically known as an atbash cipher.. substitute one letter for another.

zgyzhs grnv

atbash time

[Jennifer G.]

Originally Posted by JFT

. What's a zgyzhs grnv?

I think it's Vigenere's Cipher.

[thechrismyster]

496620796f752063616e20726561642074686973 206c6974746c6520656e63727970746564206469 7474792e206c6574206d65206b6e6f7720617361 7020616e642069276c6c2062757920796f752061 2062656572212053544f204c415421

[thechrismyster]

Originally Posted by Jennifer G.

I think it's Vigenere's Cipher.

Vigenere's and its variants are actually a step up from the atbash.

Vigenere coding is one of the most ancient forms of cryptography. In a Vigenere cipher, messages are encoded by mapping letters to numeric values and adding the plaintext values to the keytext values, modulo the number of letters in the alphabet. In this implementation, A=0, Z=25, and the modulus is 26. Despite its simplicity, the Vigenere cipher is capable of producing 100% crack-proof ciphers if used correctly. To produce an unbreakable cipher, you must:

Choose a key that is as long as the plaintext message.
Build the key from random characters.
Never use the key again.
Don't use text decorations (spaces, punctuations, capitalization).
Protect the key.
Unfortunately, these steps take all the fun out of the Vigenere cipher. Most people use English words or phrases for the key (violating step 2) that are significantly shorter than the message being coded (violating step 1). Then they use the same key to encrypt additional messages (violating step 3) because they don't want to remember a new key for each message. Some people use quotations from their favorite book for the key or invent one and write it down (violating step 5). Lastly, it's no fun to handle text that doesn't look like text, so they don't remove the decorations (violating step 4). The moral of the story is that security is free, but it requires effort.

source: http://sharkysoft.com/misc/vigenere/

[Gottle of Geer]

Originally Posted by thechrismyster

Plain: ABCDEFGHIJKLMNOPQRSTUVWXYZ
Cipher: ZYXWVUTSRQPONMLKJIHGFEDCBA

a substitution cipher - generically known as an atbash cipher.. substitute one letter for another.

zgyzhs grnv

atbash time

## You got it !!!

• I thought nobody would - how long did it take you to sort that one out ?

(BTW, I hope it's accurate )

The principle behind the atbash cipher is that the last letter of the alphabet is substituted for the first, the penultimate for the second, the antepenultimate for the third, & so forth.

There is a Biblical example - in Jeremiah 25.26, Sh[e]sh[a]ch is written for B[a]b[e]l:

• [26] Sheshach: Babylon. The word is formed from babel by substituting letters of the Hebrew alphabet in inverse order.

http://www.nccbuscc.org/nab/bible/je...jeremiah25.htm - the NAB has its uses after all