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QuintessenceLabs appoints Peter Shergold AC and Peeyush Gupta to Board of Directors.

QuintessenceLabs, the leader in quantum communications technology for networking,
communications, national security and defence, today announced that it had appointed
Peter Shergold AC and Peeyush Gupta to the company’s board of directors

Canberra, April 25, 2008: QuintessenceLabs, the leaders in ultrasecure, untappable quantum
communications technology, today announced that Peter Shergold AC and Peeyush Gupta have
been appointed to the company’s board of directors.

Peter Shergold, appointed Chairman, is currently Macquarie Group Foundation Professor in the
Australian School of Business at the University of New South Wales and also serves as a nonexecutive
director on the board of AMP. He has had a distinguished career as CEO of the Australian
Public Service for two decades. For five years from February 2003, Dr Shergold was Australia’s most
senior public administrator serving as Secretary of the Department of the Prime Minister and
Cabinet. He served four Prime Ministers and eight Ministers in both Coalition and Labor
governments. He was made a Member in the Order of Australia (AM) for public service on Australia
Day 1996. He was awarded the Centenary Medal in 2002. In 2007, he was elevated to Australia’s
highest award, the Companion in the Order of Australia (AC).

Peeyush Gupta has also achieved many successes in an outstanding career. A founding director and
Chief Executive Officer of ipac Securities Limited, he leads one of Australia’s most successful wealth
management firms. Over the past 20 years ipac has built a global financial planning business that
has helped people maximise their financial resources to achieve the goals that matter most to
them. Peeyush holds a degree in Computer Science and an MBA in finance from the Australian
Graduate School of Management.

“We are extremely pleased that we are able to attract such distinguished leaders to our board of
directors”, said Vikram Sharma, Chief Executive of QuintessenceLabs, “Dr Shergold and Mr Gupta
are fantastic additions to the QuintessenceLabs team. Their capabilities and experience will be
invaluable in guiding the company to transform leading edge science into commercial products able
to win business in a world market”.