This book constitutes the proceedings of the 2th International Workshop on Lightweight
Cryptography for Security and Privacy LightSec 2013 held in Gebze Turkey during May 6-7
2013. The 10 full papers presented together with 3 invited talks were carefully reviewed and
selected from 27 submissions. The papers are grouped in topical sections on efficient
Implementations and designs block cipher cryptanalysis wireless sensor networks and
cryptographic protocols.
