You have received this message because at some time in the past your name was submitted to our e-mail mailing list database. If you do not wish (or no longer wish) to receive announcements, updates and news concerning the RPK Encryptonite Engine or the RPK InvisiMail e-mail security products, please forward this message to remove@rpkusa.com ----------------------------------------------------------------------- MEDIA ALERT CONTACT Paula Miller Lyn Oswald Nadel Phelan, Inc. RPK Security Inc. 408-439-5570 x277 212-488-9891 paulam@nadelphelan.com lynoswald@rpkusa.com RPK SECURITY AWARDED PATENTS FOR ENCRYPTONITE ENGINE IN U.S. AND NEW ZEALAND SAN FRANCISCO, CA. September 15, 1998 - RPK Security, Inc., a technology leader in fast public key encryption, today announced that the technology behind the company's uniquely fast public key cryptosystem, the RPK Encryptonite Engine, was awarded U.S. patent number 5,799,088 on August 25, 1998 and New Zealand patent number 277,128 on August 17, 1998. Based on the proven mathematics of Diffie-Hellman Key Exchange, the RPK Encryptonite Engine combines all the benefits of other public key systems (authentication, digital signatures and digital certificates) with the speed of a secret key system into one algorithm. With the superior performance offered by RPK's Encryptonite Engine, applications requiring streaming data, sound, video or large numbers of transactions, such as credit card payments, receive instantaneous responses and secure communication links. "We believe these patents give us a significant, unique and enforceable competitive advantage over other providers of public key encryption products," said Jack Oswald, president and CEO of RPK Security. "The RPK patents confirm our technology leadership in strong and fast public key cryptography." With development and distribution facilities outside of the U.S., RPK Security is able to provide its customers with a worldwide strong encryption solution that is available globally, unlike competing products that are restricted by U.S. export regulations. ABOUT RPK SECURITY Founded in 1995, RPK Security, Inc. is a technology leader in fast public key cryptography. Its flagship RPK Encryptonite™ Engine, a uniquely fast and strong public key encryption technology, is available worldwide in custom hardware and software toolkits on multiple platforms. Developed from widely accepted security mathematics and techniques, the RPK Encryptonite Engine is easily embedded into new and existing hardware and software applications. RPK's cryptographic research and product development is based in New Zealand, Switzerland and the U.K, with worldwide sales and marketing operations in San Francisco, CA. Visit RPK's website at www.rpkusa.com or call (212) 488-9891.