Cryptographic Hardware and Embedded Systems - CHES 2005 Security and Cryptology : Springer : 9783540284741 : 3540284745 : 18 Aug 2005 : Thesearetheproceedingsofthe7thWorkshoponCryptographic Hardwareand EmbeddedSystems(CHES2005)heldinEdinburgh,ScotlandfromAugust29to September1,2005.TheCHESworkshophasbeensponsoredbytheInternational Association for Cryptologic Research (IACR) for the last two years. We received a total of 108 paper submissions for CHES 2005. The doub- blindreviewprocessinvolveda27-memberprogramcommittee anda largen- ber of external sub-referees. The review process concluded with a two week d- cussion process which resulted in 32 papers being selected for presentation. We are grateful to the program committee members and the external sub-referees for carrying out such an enormous task. Unfortunately, there were many strong papers that could not be included in the program due to a lack of space. We would like to thank all our colleagues who submitted papers to CHES 2005. In