Exhibit 3.33 NATIONAL COMPANIES AND SECURITIES COMMISSION Companies (Victoria) Code Sub-section 72 (9) Registered No.: C- 284180-N CERTIFICATE OF INCORPORATION ON CHANGE OF NAME OF COMPANY This is to certify that TWENTY SECOND LAWGAM SHELF PTY. LTD. which was on the 23rd October, 1984 incorporated under the Companies (Victoria) Code as a proprietary company, on the 21st March, 1985 changed its name to DATAKEY ALCATEL PTY. LTD. and that the company is a proprietary company, and is a company limited by shares. Given under the seal of the National Companies and Securities Commission at Melbourne on this 21st day of March 1985 [signature illegible] A person authorised by the Commissioner for Corporate Affairs for the State of Victoria Delegate of the National Companies and Securities Commission. NATIONAL COMPANIES AND SECURITIES COMMISSION Companies (Victoria) Code Sub-section 72 (9) Registered No.: C- 234180-N CERTIFICATE OF INCORPORATION ON CHANGE OF NAME OF COMPANY This is to certify that TWENTY SECOND LAWGAM SHELF PTY. LTD. which was on the 23rd October, 1984 incorporated under the Companies (Victoria) Code as a proprietary company, on the 21st March, 1985 changed its name to DATAKEY ALCATEL PTY. LTD. and that the company is a proprietary company, and is a company limited by shares. Given under the seal of the National Companies and Securities Commission at Melbourne on this 21st day of March 1985 [signature illegible] A person authorised by the Commissioner for Corporate Affairs for the State of Victoria Delegate of the National Companies and Securities Commission. 2