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new-algorithm

Challenge Text

  • On the first day of the job, a new cryptography intern is insisting to upper management that he developed a new encryption algorithm for the company to use for sensitive emails and should get a raise. This seems too good to be true... are you able to prove the intern wrong by decrypting it?

  • Here's an example of an encrypted email message using the intern's algorithm: amN0Znt0UllfQUVTX0lOc1QzQGR9

Hint

  • What are some differences between encryption, encoding, and hashing?

Solution

  • Recognize the usage of Base64 encoding and copy the text into a Base64 decoder:
  • Flag: jctf{tRY_AES_INsT3@d}

Credit