Number Theory: Research on universal form, regular form, modular form, local-wide principle, grid structure, etc. in relation to question 11 of Hilbert 23 (secondary form expression theory).
Cryptography: Symmetric Key Ciphers (AES, etc.), Public Key Ciphers (RSA, ECC, etc.), Broadcast Ciphers, Authentication, Signature, Isomorphic Ciphers, LLL-Alarm, Cryptographic Analysis, Digital Forensics, etc.