THE Federal Government is considering a national criminal identity database as a weapon against terrorism. Under the proposal, existing police data bases would be integrated and cross-referenced so potential terrorist activities in one area would lead to alerts in other areas. The proposal is being pushed by Liberal backbencher Jason Wood, a former member of the Victorian police counter-terrorism unit, and Parliamentary Secretary to the Minister for the Environment, Greg Hunt. The two have written to Attorney-General Philip Ruddock outlining a detailed plan. A spokeswoman for Mr Ruddock said the Attorney-General was "cautiously supportive". In the letter, obtained by The Sunday Mail, Mr Wood and Mr Hunt recommend that the ID database be structured around the existing national money-laundering watch, CrimTrac. The letter says: "In further support of the Prime Minister's recently announced terrorism measures we would like to propose that the CrimTrac data base be extended to include holders of the new aviation and maritime identification cards, ammonium nitrate fertiliser licence holders, high-consequence dangerous goods licences and licence-holders for explosives including underwater explosives techniques courses."