The Atbash cipher is one of the oldest known substitution ciphers, with roots tracing back to ancient Hebrew texts and biblical manuscripts.
The Atbash cipher originated in ancient Hebrew cryptography and was used to encode sensitive information in biblical texts. The name "Atbash" comes from the first, last, second, and second-to-last letters of the Hebrew alphabet. Learn more about how this ancient cipher works in our detailed how-it-works guide.
The Atbash cipher works by substituting each letter with its corresponding letter from the reversed alphabet. For example, in English: A becomes Z, B becomes Y, C becomes X, and so on. You can try this transformation using our online Atbash cipher tool.
Several instances of the Atbash cipher can be found in the Hebrew Bible, particularly in the books of Jeremiah and Ezekiel, where it was used to disguise names of foreign nations and rulers. Experience the original cipher with our Hebrew Atbash cipher tool.
Our platform extends the ancient Atbash principle to multiple modern languages, including German, French, Spanish, Italian, Chinese, Japanese, Korean, Arabic, Greek, and Russian. View all available languages on our languages page.
For common questions about the Atbash cipher and its applications, visit our comprehensive FAQ section. Whether you're a student, researcher, or cryptography enthusiast, our tools provide an accessible way to explore this fascinating piece of cryptographic history.