Key Decryptor

December Cryptography Challenges

31 Days • 31 Ciphers

Day 4

Secrets - Submit Flag

A double agent has delivered an encrypted hex string. Intelligence reports suggest it was encrypted using the XOR (exclusive OR) cipher with a single repeating byte as the key. XOR encryption is symmetric—the same key both encrypts and decrypts. Your mission: brute force the key space (0-255) to reveal the secret.

Encrypted Text:

4b 65 79 20 3d 20 30 31 3a 20 52 64 62 73 64 75 4a 64 78 0a 4b 65 79 20 3d 20 30 32 3a 20 51 67 61 70 67 76 49 67 7b 0a 4b 65 79 20 3d 20 30 33 3a 20 50 66 60 71 66 77 48 66 7a 0a 4b 65
December Cryptography Challenges - 31 Days of Encoding and Decoding Challenges