Keyphrases
- chosen ciphertext
- standard model
- encryption scheme
- ciphertext
- forward secure
- group signature
- public key encryption scheme
- signcryption scheme
- public key
- security analysis
- diffie hellman
- secret key
- cca secure
- data sharing
- signature scheme
- secret sharing scheme
- provably secure
- hash functions
- cryptographic protocols
- database systems
- databases