The National Institute of Standards and Technology Handbook 150-17 "National Voluntary Laboratory Accreditation Program Cryptographic and Security Testing" presents technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Cryptogrpahic and Security Testing program. It is intended for information and use by accredited laboratories, laboratories seeking accreditation, laboratory accreditation systems, users of laboratory services, and others needing information on the requirements for accreditation under this program. The 2011 edition of NIST Handbook 150-17 incorporates changes resulting from refinements from various validation programs as well as elimination of redundancies from this handbook versus NIST Handbook 150, as well as editorial improvements. The requirements of NIST Handbook 150, the interpretations and specific requirements in NIST Handbook 150-17, and the requirements in program-specific checklists (if applicable) must be combined to produce the criteria for accreditation in the NVLAP Crypotgraphic and Security Testing program.