This category focuses on using advanced mathematical topics to encrypt data to prevent it from being intercepted/tampered with. Cryptography has many practical applications from HTTPS to cryptocurrency. The cryptography challenges in this contest include:
- Clear and Concise Commentary on Caesar Cipher [20 points]
- Flip My Letters [20 points]
- RSA 1 [50 points]
- Let Me Be Frank [75 points]
- RSA 2 [80 points]
- Decode Me [100 points]
- Hash on Hash [100 points]
- RSA 3 [135 points]
- Diffie-cult [140 points]
- Security Through Obscurity [150 points]
- Lost Seed [150 points]
- Listen Closely [200 points]
- RSA 4 [200 points]
- Genius [230 points]
- Premium RSA [350 points]
- Paillier Service [400 points]