Justice Lynne Leitch found there is "no reasonable expectation of privacy" in subscriber information kept by Internet Service Providers, in a decision issued earlier this week.
The decision is binding on lower courts in Ontario and it is the first time a Superior Court level judge in Canada has ruled on whether there are privacy rights in this information that are protected by the Charter. The ruling is a significant victory for police investigating crimes such as possession of child pornography, while privacy advocates warn there are broad implications even for law-abiding users of the Internet.
"There is no confidentiality left on the Internet if this ruling stands," said James Stribopoulos, a professor at Osgoode Hall Law School in Toronto.
Canada's privacy commissioner also warned yesterday the Conservative government's plans to revive legislation that would force Internet Service Providers to allow police to intercept Internet-based conversations "is a serious step forward toward mass surveillance" that violates the privacy rights of Canadians.
"My concerns are a huge increase in surveillance powers," Jennifer Stoddart said yesterday. "I understand there are technological challenges for the forces of law and order ... but is this the only way this can be done?"
Police and the Canadian Security Intelligence Service already have the power to wiretap private communications, but the laws were written before the era of the Internet and wireless technologies such as mobile phones.
The court ruling by Judge Leitch was made in a possession of child pornography case in southwestern Ontario.
A police officer in St. Thomas faxed a letter to Bell Canada in 2007 seeking subscriber information for an IP address of an Internet user allegedly accessing child pornography.
The court heard it was a "standard letter" that had been previously drafted by Bell and the officer "filled in the blanks" with a request that stated it was part of a child sexual exploitation investigation.
Bell provided the information without asking for a search warrant. The name of the subscriber was the wife of the man who was eventually charged with "possession of child pornography" and "making available child pornography."
Most ISPs in the country require search warrants to turn over subscriber information unless it is a child pornography investigation.
Ron Ellis, the lawyer for the defendant, stressed to the judge there was no allegation of attempted luring or of a child in immediate danger. The "making available" charge stems from peer-to-peer websites that permit the downloading of images from other users.
Mr. Ellis argued police should have been required to seek a search warrant to obtain the subscriber information.
Judge Leitch accepted the arguments of Crown attorney Elizabeth Maguire the information is similar to what is in a phone book.
"One's name and address or the name and address of your spouse are not biographical information one expects would be kept private from the state," said Judge Leitch.
The reasoning of the judge misses the context of what police are seeking, said Mr. Stribopoulos.
"It is not just your name. It is your whole Internet surfing history. Up until now, there was privacy. An IP address is not your name, it is a 10-digit number. A lot more people would be apprehensive if they knew their name was being left everywhere they went," he said.
This information should require a search warrant by police if there is suspected criminal activity, said Mr. Stribopoulos. Judges are accepting the argument that this is "just your name" because "everyone wants to get at the child abusers," he said.