My research mainly focuses on cyber security and applying various cryptographic technologies into real world systems. They include, but not limited to,

• Blockchain: security, privacy, cryptocurrency
• Cloud Security: cloud data protection, privacy in cloud, cloud access control 
• Big Data Security: searchable encryption, database security
• Lightweight Security: cryptographic algorithms for lightweight device
• Applied Cryptography: public key cryptography, identity-based cryptography, digital signature, attribute-based system, anonymous signature (e.g. group signature, ring signature) etc.