This book constitutes the refereed proceedings of the 5thInternational Conference on Security, Privacy, and Applied CryptographyEngineering, SPACE 2015, held in Jaipur, India, in October 2015.The 17 full papers presented in this volume werecarefully reviewed and selected from 57 submissions. The book also contains 4invited talks in full-paper length. The papers are devoted to various aspectsof security, privacy, applied cryptography, and cryptographic engineering.