The 21full papers presented in these proceedings were carefully reviewed and selected from 45 submissions. The papers are organized in the following topical sections: Cryptanalysis of Lightweight Ciphers; Side-Channel Attacks and Countermeasures; Post-Quantum Constructions; Symmetric cryptography and fault attacks; Post-Quantum Analysis and Implementations; Homomorphic encryption; Public-Key Cryptography; and Differential Cryptanalysis.