This book constitutes the proceedings of the 15th International Workshop on Cryptographic Hardware and Embedded Systems, CHES 2013, held in Santa Barbara, CA, USA, in August 2013. The 27 papers presented were carefully reviewed and selected from 132 submissions. The papers are organized in the following topical sections: side-channel attacks; physical unclonable function; lightweight cryptography; hardware implementations and fault attacks; efficient and secure implementations; elliptic curve cryptography; masking; side-channel attacks and countermeasures.

This book constitutes revised selected papers from the 11th International Workshop on Constructive Side-Channel Analysis and Secure Design, COSADE 2020, held in Lugano, Switzerland, in April 2020. Due to COVID-19, the workshop was held online. The 15 papers presented in this volume were carefully reviewed and selected from 36 submissions. The workshop covers subjects from wide ranges such as secure design, side channel attacks and countermeasures, and architectures and protocols.