This volume contains 25 journal refereed papers addressing a wide range of topics in coding and cryptography. The selected papers are the full journal versions of extended abstracts accepted for presentation at the International Workshop on Coding and Cryptography (WCC 2011) held in Paris, France, April 11-15, 2011. The aim of WCC is to bring together research- ers in all aspects of coding theory, cryptography and related areas, theoretical or applied. The variety of topics covered by WCC is a recurring feature of the workshop and attracts many colleagues. Each of the 112 extended abstracts originally submitted to the workshop were reviewed by at least two members of the Program Committee. As a result of this screening process, 53 were selected for presentation at the workshop together with three invited talks. The authors of the presented papers were in turn invited to submit full versions of their papers to the Designs, Codes and Cryptography journal. Each of the full-version submissions were once again thoroughly examined and commented upon by at least two anonymous reviewers. This volume is the end result of this second full-fledged reviewing process. We are grateful to the reviewers who contributed to guaranteeing the high standards of these papers. We would like to thank all the authors and all the other participants of the WCC for making it a highly enjoyable and stimulating event.