One of e-commerce's key technologies the cookie may be banned by the European Parliament, sparking concern from the Australian Internet industry.
Cookies are the small computer files used to store information about a user's Internet browsing patterns.
If cookies are banned, people who regularly shop and bank online may be put off by having to reregister or reenter preferences every time they revisit an online shop.
The European Parliament will vote on November 13 on whether to make cookies illegal.
It has been estimated the move could cost British online businesses alone more than $540 million.
The cookie ban is included in draft legislation following a major report into data protection.
News source: Australian IT