Kinoco Hacker Hands-on security practice
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Cryptography Level 2 60 points

Breaking Small RSA Keys

Mission

Factor a tiny RSA modulus, recover the private exponent, and decrypt a list of ciphertext values. Public key and ciphertexts: n = 323 e = 5 ciphertexts = [115, 181, 241, 109, 109, 57, 190, 115, 241, 57, 65, 271, 49, 115, 57, 241, 190, 271, 57, 85, 271, 241, 65] Factor n to recover the private exponent d and decrypt each value. Wrap the decrypted string in KINOCO{...} to form the flag.

#cryptography#rsa#factorization

Clear it in 3 steps

Not started

  1. No environment needed

    This challenge can be solved with the information in the statement alone. Submit the flag you find directly.

  2. Submit the flag