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Zix Corporation Completes First Full-year SysTrust Certification; ZixSecure Center meets both SysTrust and SAS-70 reporting standards

DALLAS--(BUSINESS WIRE)--June 7, 2004--Zix Corporation (ZixCorp(R)), (Nasdaq:ZIXI), a global provider of e-messaging protection and transaction services, today announced it has completed its first full-year American Institute of Certified Public Accountants (AICPA) SysTrust certification audit of the ZixSecure Center, the world-class data center that handles operations for ZixCorp services.

The audit team certified system reliability for effectiveness of controls over the security, availability, processing integrity, and confidentiality for the ZixSecure Center. ZixCorp received its initial SysTrust certification from Deloitte & Touche LLP in May 2003, and Deloitte recently concluded this latest audit after an interim review in December 2003.

"Deloitte has recently completed its AICPA/CICA SysTrust audit of the ZixSecure Center and related ZixMessage Center(TM) functions for the year ended April 30, 2004. This represents the first full-year audit, and our report will be issued without qualification," said Bruce Barrick, the Deloitte & Touche Enterprise Risk Services partner who supervised the audit.

"This year we will also be issuing our audit report under the AICPA's SAS-70 reporting standard. We look forward to working with ZixCorp as it expands SysTrust audit coverage to its new healthcare applications," added Barrick.

Both SAS-70 and SysTrust are industry-recognized audit standards sponsored by the AICPA and the Canadian Institute of Chartered Public Accountants (CICA) that demonstrate commitment to internal control effectiveness. A SAS-70 examination signifies that an organization has had its control objectives examined by an independent accounting and auditing firm. In a SysTrust system-reliability audit, the independent CPA verifies that a company has effective system controls and safeguards that meet pre-defined principles and criteria related to issues such as security, availability, processing integrity and confidentiality.

"We're proud that the staff of the ZixSecure Center ensures the facility meets these rigorous standards every day," said David Robertson, vice president of engineering and operations for ZixCorp and the company's SysTrust executive sponsor. "By meeting both the SysTrust and SAS-70 audit standards, we are able to broaden our ability to communicate that our customers and prospects can trust our management standards for achieving reliability, integrity, security, and confidentiality."

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 environment and expressly equipped with the controls that address those risks.

The SysTrust and SAS-70 reports from this audit will be available on ZixCorp's Web site by mid-June.

About Zix Corporation

Zix Corporation (ZixCorp(R)) is a global provider of e-messaging protection and transaction services. ZixCorp offers a range of solutions to protect organizations from viruses, spam, and electronic attack, as well as enabling secure electronic communications, such as email encryption, e-prescribing, on-line doctor visits, and electronic lab results. ZixCorp helps organizations of any size to streamline operations, reduce risks, and leverage the efficiencies of e-messaging. For more information, visit

CONTACT: Zix Corporation, Dallas
Kim Tompkins, 214-515-7338

SOURCE: Zix Corporation