Introductory CTF

Challenges

  • Cryptography
  • Crypto 1

    Here is an encrypted message. Can you decrypt it? I think this one might have been considered insecure even back in Caesar's time.

    Guvf vf bar bs gur rneyvrfg pvcuref

    Crypto 2

    It is important to remember that encrypting and encoding are not the same. With that in mind, can you tell me what this message says? Remember that Francis Bacon was 64 years old when he died.

    MDAxMTEgMDAxMDAgMDEwMTAgMDEwMTAgMDExMDEgMTAwMDAgMDAwMTAgMDAwMTA=

    Crypto 3

    You'll need to divide Francis Bacon's age by 2 to start. Then know that your exclusive key is the letter x -- or is it the letter x -- it is its own undoing. Finally, do all the previous problems in reverse back up to 1.

    GU6D2DZVFQ4R6NJ4HEHTKPB5D42TYOIAGUWD2HZVHQ6QANJMHUPTKLBZB42SYPI7GU6D2ABVFQ6R6NJMHEHTKLB5D42TYOIAGUWDSRI=