I'm a computer science student (not a mathematican) and I'm gonna to write a master degree diploma on applied cryptography. Specifically, I'd like to create a realization of some cryptographic stuff that is not widely deployed or even lacks of realizations by some reason (maybe because it's really new or it's just not very useful in practice for now). I know some concepts that I think meets my situation: Honey encryption, Format-preserving encryption, Deniable encryption, Chaffing and winnowing, Key derivation functions (sometimes they lacks of realizations on GPU/FPGA/ASIC), Post-quantum cryptography. Sorry, I can't post more than one link in question due to lack of reputation.
Maybe, I missed some new directions in cryptography today that needs one more realization or even first realization? Please tell me.