Worm.com

Symantec Corp. (NASDAQ: SYMC) today announced
it has been granted a new patent for antivirus technology by the United
States Patent and Trademark Office. Symantec was granted U.S. patent
number 6,971,019 for histogram-based malicious code detection technology
that accelerates the detection of complex threats and security risks,
including viruses, worms, Trojan horses, blended threats, spyware, and
adware.

Histogram-based malicious code detection is a fundamental antivirus
technology employed throughout Symantec’s portfolio of antivirus solutions
at the desktop, server, and gateway to protect both consumers and
enterprises. Carey Nachenberg, Symantec Fellow and chief architect with
Symantec Research Labs, developed and patented the technology. This marks
the seventeenth patent awarded to Nachenberg since 1997 in the field of
information security.

“With this patent, Symantec continues to set the standard in the
information security space for innovating new technology that is
fundamental for protecting individuals and businesses alike from today’s
cyber threats,” said Mark Bregman, chief technology officer, Symantec.
“The enormous diversity of our technology portfolio, including this patent,
puts us in a unique position to offer our customers a broad range of
security and availability solutions tailored to fit their specific needs.”

“Histogram-based malicious code detection is one of the most effective and
efficient ways of solving the problem of complex threat detection,” said
Nachenberg. “Without this technology, it would be extremely difficult to
identify such threats without also significantly impacting performance.”

Malicious code typically has one or more behaviors or instructions that
identify it as a specific strain of threat. Histogram-based malicious code
detection technology uses a prioritized count of various behaviors and
instructions to identify code moving across a system or a network and more
quickly determine whether a threat is or is not present.

Symantec maintains a diverse portfolio of intellectual property such as
copyrights, trademarks, trade secrets, and technological expertise. In
particular, Symantec frequently applies for patents in the United States
and internationally to protect its inventions. Symantec currently owns
more than 200 patents in a variety of areas, including antivirus, intrusion
detection/prevention, firewall, security and software management, storage
and imaging, software distribution, compression/encryption, anti-spam,
anti-spyware, and virtual private network security.

About Symantec

Symantec is the world leader in providing solutions to help individuals and
enterprises assure the security, availability, and integrity of their
information. Headquartered in Cupertino, Calif., Symantec has operations
in more than 40 countries. More information is available at
www.symantec.com.

NOTE TO EDITORS: If you would like additional information on Symantec
Corporation and its products, please view the Symantec Press Center at
http://www.symantec.com/PressCenter/ on Symantec’s Web site. All prices
noted are in US dollars and are valid only in the United States.

Symantec, the Symantec logo, VERITAS, and the VERITAS logo are trademarks
or registered trademarks of Symantec Corporation or its affiliates in the
United States and certain other countries. Additional company and product
names may be trademarks or registered trademarks of the individual
companies and are respectfully acknowledged.

CONTACT:

Cris Paden
Symantec Corporation
408/517-8547
cpaden@symantec.com

Mike Bradshaw
Connect Public Relations
801/373-7888
mikeb@connectpr.com

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