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Level III Challenges (74)
Page 1 of the challenges in Level III, ordered by date posted (the most recent appear first).
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Handycipher is a newly created cipher designed to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. Part 8 is the same as Part 5, but uses an improved version of the cipher. You are given the ciphertext and 229 letters occuring at an unknown location in the plaintext. Read more...
Click here to get to the corresponding forum topic to share your opinion. Click here to download the challenge. Click here to download the additional file of the challenge. |
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