This book constitutes the refereed proceedings of the 10th International Workshop on Security and Trust Management, STM 2014, held in Wroclaw, Poland, in September 2014, in conjunction with the 19th European Symposium Research in Computer Security, ESORICS 2014. The 11 revised full papers were carefully reviewed and selected from 29 submissions and cover topics as access control, data protection, digital rights, security and trust policies, security and trust in social networks.