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Zix Corporation Completes Interim SysTrust Certification Review; Company well positioned for second-year certification renewal of the ZixSecure Center

DALLAS--(BUSINESS WIRE)--Dec. 17, 2003--Zix Corporation (ZixCorp(TM)), (Nasdaq:ZIXI), a global provider of protection, management, and delivery solutions for electronic communications, today announced that it has completed the first stage of its second American Institute of Certified Public Accountants SysTrust(TM) certification review by Deloitte. The audit team reviewed system reliability for effectiveness of controls over the security, availability, processing integrity, and confidentiality of the ZixSecure Center(TM), the world-class data center that handles operations for ZixCorp services.

ZixCorp received its initial SysTrust certification in May 2003. To ensure that SysTrust standards are consistently maintained, ZixCorp requested an early start of the mandatory annual audit process. The Deloitte audit team will complete its audit work in April and May of next year as part of the ongoing requirements established by the AICPA/CICA SysTrust program.

"Our compliance and progress has been more than acceptable since our original certification, but this mid-year exercise has given us an extra measure of confidence," said David J. Robertson, vice president of engineering and SysTrust executive sponsor for ZixCorp. "During the week of examination and the six months leading up to the interim review, the auditor had no critical observations. I'm extremely proud of the efforts and achievement of the ZixSecure Center staff and all ZixCorp employees to keep our security and processes at SysTrust-level standards and better."

SysTrust certification helps increase the comfort of management, customers, and business partners that support a business or a particular activity. The SysTrust standards used to evaluate the reliability of a system cover the areas of availability, security, processing integrity, and confidentiality. SysTrust certification is sought by organizations that perform mission-critical operations and must be trusted and absolutely reliable. It is awarded only to organizations that are attuned to the risks posed by their network environment and expressly equipped with the controls that address those risks.

"ZixCorp has become a model client in institutionalizing the SysTrust requirements in its day-to-day operating procedures," said Bruce Barrick, Deloitte's Enterprise Risk Services engagement partner. "This is the logical approach to meeting its clients' and industry expectations for maintaining systems reliability."

Dennis Heathcote, vice president of marketing and products for ZixCorp says, "The SysTrust certification has become a very positive differentiator for us against our competition. In fact, very few of our competitors within the hosted-service marketplace have this certification. We have found that companies want to know that their information is being properly handled throughout the e-messaging process. Following the guidelines are second nature to all of us at ZixCorp, but the certification provides evidence that we live up to the standards of what is considered prudent business practice."

About Zix Corporation

Zix Corporation (ZixCorp(TM)) provides solutions worldwide that protect, manage, and deliver sensitive electronic information. By offering a comprehensive set of services, ZixCorp protects organizations from viruses and spam and provides the management tools needed for Web access control and policy-driven email encryption. ZixCorp also provides care delivery solutions for e-prescribing and e-consulting that enable physicians to leverage technology for better patient care. For more information, visit www.zixcorp.com.

CONTACT: ZixCorp
Media
Whitney Gilliam, 214-515-7338
wgilliam@zixcorp.com
or
Investor
Brad Almond, 214-515-7357
balmond@zixcorp.com

SOURCE: Zix Corporation