STRASBOURG, France — Canada became the first non-European country Friday to sign up to combat "cyberhate," the online dissemination of xenophobic propaganda.

Canada signed an additional protocol to the international cybercrime convention, drafted in 2001 by the Council of Europe.

Signed by several dozen countries, including Canada, the United States, South Africa and Japan, the convention names four types of cybercrime: confidentiality offences, notably breaking into computers; fraud and forgery; content violations, such as child pornography and racism; and copyright offences.

The treaty aims to speed up international co-operation in investigations and extraditions.

The additional protocol widens the scope of the convention to combat xenophobic propaganda and calls on countries to criminalize its distribution via computer, as well as Internet sites that deny or approve of genocide and crimes against humanity.

The cybercrime convention constitutes a basis for Canada's law criminalizing racist hatred on the Internet, said Canada's Justice Minister Irwin Cotler after signing the additional protocol.

"No one country alone can combat racist hate, particularly cyberhate," Cotler said.

"This is an anonymous, borderless, faceless crime. We've gone from five hate sites on the Internet in 1995 to 5,000 in 2005. These are horrific sites. They're used for purposes of recruitment. They particularly target the young. It is predatory hate of the worst kind."

Cotler said international treaties facilitating extradition and prosecution of perpetrators of hate crimes on the Internet are particularly important in the light of Thursday's deadly attacks on public transport in London.

"We believe that incitement to hatred is the most proximate cause of terrorism itself. Therefore, if you're combating incitement to hatred, you're combating terrorism," he said.