Ross was speaking at a meeting in London last week to mark the fourth anniversary of tScheme, which guarantees authenticity of online identity to firms.
At the meeting, e-minister Stephen Timms warmly applauded the scheme, which is at the core of government and industry portals for the defence and oil industries, but he stopped short of supporting the call to make it mandatory.
Timms said ID cards, phishing prevention, online voting, electronic banking transactions and other virtual activities will require authentication.
"With tScheme, the government set broad objectives and business experts found the most effective way of delivering them. TScheme has adapted as circumstances have changed, which would have been impossible under the traditional model," he said.
David Lacey, IT security director of Royal Mail and chairman of the Jericho Group, called tScheme an excellent initiative.
"It is time to identify requirements for the next five years. Security policy is broadening and requires rules that move with the data," he said.