Prompt

Our analysts have obtained password dumps storing hacker passwords. See if you can crack them.

Walk-Through

This challenge will give you experience decoding shift ciphers. This message is encrypted using the atbash cipher.

The text for this challenge, at first, looks like a Caesar shift cipher. The atbash cipher is similar in that the alphabet is shifted, however, the entire alphabet is reversed. With an atbash cipher, there is only one way that the letters are shifted; this is not the case with a Caesar shift cipher.

Plaintext: ABCDE FGHIJK LMNOP QRSTUV WXYZ

Ciphertext: ZYXWV UTSRQP ONMLK JIHGFE DCBA

To decode, replace the ciphertext letter in the alphabet above with the plaintext letter that matches its position in the alphabet. For example, “U” is the 6th letter in the ciphertext alphabet, so it should be replaced with “F” to get the plaintext message.

You can also use the other tools below to help make sure you are using the right cipher to decode. Atbash and Caesar shift ciphers look very similar, so it is not entirely possible to know at first glance which is being used.

Useful tools for decoding/encoding:

• rumkin.com
• CyberChef

Questions

1. hzuvob lyerlfh xzev

This message can be decoded by hand or through an online tool such as Rumkin or CyberChef.

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