High Quality Content by WIKIPEDIA articles! Cryptography Research, Inc.. is a San Francisco based cryptography company specializing in applied cryptographic engineering, including technologies for building tamper-resistant semiconductors. It was purchased on June 6, 2011 by Rambus for more than $250M in cash and stock. The company licenses patents for protecting cryptographic devices against power analysis attacks. The company`s CryptoFirewall-brand ASIC cores are used in pay TV conditional access systems and anti-counterfeiting applications. CRI also developed BD+, a security component in the Blu-ray disc format, and played a role in the format war between HD DVD and Blu-ray. The company`s services group assists with security testing, disaster recovery, and training.