Cryptography Research and Entropic Sign License Agreement for DPA Countermeasures to Secure Next Generation Content

Security technology fully protects set-top box SoCs from non-invasive side channel attacks

SAN FRANCISCO and SAN DIEGO – July 23, 2014 – Cryptography Research, the security division of Rambus (NASDAQ:RMBS), and Entropic (NASDAQ:ENTR), a world leader in semiconductor solutions for the connected home, today announced they have signed a patent license agreement allowing for the use of the Cryptography Research side-channel attack countermeasures in Entropic's integrated circuits. The Cryptography Research patented technology will protect Entropic's set-top box system-on-a-chip (SoC) products against differential power analysis (DPA) and related attacks. This agreement builds on the previous agreement between the two companies with Entropic already licensing the Cryptography Research CryptoFirewall™ tamper-resistant core for set-top boxes.

"While high value content enhances the Pay-TVexperience, it also carries with it substantial risk for our OEM and ServiceProvider customers," said Matt Rhodes, senior vice president, Global Marketing, Entropic. "Today's premium programming requires strong protection systems and CRI's DPA countermeasure technology provides an essential foundation for any Conditional Access or Digital Rights Management system."

"The market demands for protection againstnon-invasive side channel attacks such as DPA have grown with the continuedrise of high quality content," said Paul Kocher, chief scientist of the Rambus Cryptography Research division . "Entropic has been a terrific partner for our CryptoFirewall technology and is once again taking a leadership role in deploying strong content protection technology in the set-top box SoC market."

Using DPA, attackers can measure the power consumption of a set-top box chip to extract secret cryptographic keys stored within the set-top box. The discovery of secret keys undermines the security ofset-top boxes within a service provider's network and can result in the theft of valuable, high-quality content and services as well as leaving other data like personal information vulnerable. Set-top box SoCs that contain DPAcountermeasures prevent the power consumption analysis through a series oftechniques to ultimately protect the secret keys of a set-top box from being discovered.

Side channel and DPA attacks are non-invasive attacks that involve monitoring the fluctuating electrical power consumption ofa target device and then using advanced statistical methods to derivecryptographic keys and other secrets. Strong countermeasures to these attacks help protect tamper-resistant products used in applications such as banking, pay television, mass transit, secure ID, and wireless telecommunications.

Foradditional information on DPA Countermeasures, CryptoFirewall or onCryptography Research visit cryptography.com.

About Entropic

Entropic™ (Nasdaq:ENTR)is a world leader in semiconductor solutions for the connected home. The Company transforms how traditional HDTV broadcast and IP-based streaming videocontent is seamlessly, reliably, and securely delivered, processed, anddistributed into and throughout the home. Entropic's next-generationSet-top Box (STB) System-on-a-Chip (SoC) and Connectivity solutions enable Pay-TV operators to offer consumers more captivating whole-home entertainmentexperiences by transforming the way digital entertainment is delivered,connected and consumed – in the home and on the go. For more information, please visit Entropic at: www.entropic.com, read our blog Entropic Topics,or get social with us at @Entropic_News,or on Facebook, Google+, YouTube and LinkedIn.

About Cryptography Research, Inc.

Cryptography Research, Inc. (CRI), a division of Rambus Inc., is a leader in semiconductor security research and development. Established by internationally renowned cryptographer Paul Kocher, CRI develops and licenses innovative technologies inareas including tamper resistance, content protection, anti-counterfeiting, network security, and financial services. Over seven billion security productsare made each year under license from CRI. Security systems designed by CRIscientists and engineers protect hundreds of billions of dollars in commerce annually. Additional information is available at: cryptography.com.