Atbash Cipher
The alphabet is flipped: the first letter swaps with the last. There is no key, and decryption works the same way as encryption.
The Russian alphabet shifts within its own circle, the Latin one within its own.
Letters can be Russian or Latin: the key repeats across the whole length of the text.
Usually it is treated the same as е: that is how almost every textbook does it.
0 characters · 0 letters
Encrypted text
Variants that look like real text
by letter frequencyAtbash was invented for the Hebrew alphabet: the first letter, "aleph", was replaced with the last one, "taw", and the second letter, "beth", with the second-to-last one, "shin". The name of the cipher comes from these four letter names.
The cipher appears in the Book of Jeremiah: the mysterious word "Sheshach", when the letters are substituted back, reads as "Bavel", that is, Babylon.
Atbash has no key at all, so it offers no security: once you know the trick, you can read the text at once. The good part is that the cipher is its own inverse, so there is no mode to switch, the same operation both encrypts and decrypts.
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