The two-volume set LNCS 10769 and 10770 constitutes the refereed proceedings of the 21st IACR
International Conference on the Practice and Theory of Public-Key Cryptography PKC 2018 held
in Rio de Janeiro Brazil in March 2018. The 49 revised papers presented were carefully
reviewed and selected from 186 submissions. They are organized in topical sections such as
Key-Dependent-Message and Selective-Opening Security Searchable and Fully Homomorphic
Encryption Public-Key Encryption Encryption with Bad Randomness Subversion Resistance
Cryptanalysis Composable Security Oblivious Transfer Multiparty Computation Signatures
Structure-Preserving Signatures Functional Encryption Foundations Obfuscation-Based
Cryptographic Constructions Protocols Blockchain Zero-Knowledge Lattices.
