We construct an e cient identity based encryption system based on the standard learning with errors (LWE) problem. Our security proof holds in the standard model. The key step in the construction is a family of lattices for which there are two distinct trapdoors for nding short vectors. One trapdoor enables the real system to generate short vectors in all lattices in the family. The other , This publication implements Air Force Policy Directive (AFPD) 11-2, Aircrew Operations, and supports Air Force Instruction (AFI)/Air Force Manual (AFMAN) 11-2AE Vol 3, Aeromedical Evacuation (AE) Operations Procedures. It establishes procedures and guidance for the basic aeromedical evacuation configurations for C-130, C-17, KC-135, and C-21 aircraft to safely and successfully accomplish their , This supplement sets out Lakenheath-specific procedures for maintenance of all assigned aircraft and equipment. This publication applies to all assigned, attached or associated units of the 48th Fighter Wing (FW). Refer recommended changes and questions about this publication to the Office of Primary Responsibility (OPR) using the AF Form 847, Recommendation for Change of Publication. Route AF , To complete the DD Form 2870, please follow these instructions: Block 1: Patient name Block 2: Patient’s date of birth Block 3: Patient’s SSN Block 4: Indicate the date(s) of treatment patient wants another individual to have access to (i.e., write in “All time periods”, or put in a specific time of your choice) Block 5: Mark all that apply. If patient is authorizing only regular , E-waste recycling has become a hotly debated global issue. This study, using China as a case study, analyzes the environmental, economic, and social implications of e-waste recycling in the developing world. More practical approaches, taking into account local economic and social conditions and the principles of Extended Producer Responsibility, are recommended to alleviate the increasing , .