Methods and systems for the negotiation of a population of RFID tags with improved security is provided. In one aspect, a binary traversal is performed to singulate tags without using information that directly identifies the tags in the tag population. A key is generated to identify each RFID tag of...http://www.google.co.uk/patents/US7195173?utm_source=gb-gplus-sharePatent US7195173 - Optimization of a binary tree traversal with secure communications
