"Citizenship and Immigration Canada can remove a person considered to be a security threat by issuing a Security Certificate signed by the solicitor general and the minister of citizenship and immigration, and endorsed by a judge of the Federal Court.

When a security certificate is issued:


All other immigration proceedings are suspended until the Federal Court makes a final decision about the certificate.
Foreign nationals who are the subject of a Security Certificate are automatically detained. Permanent residents may be detained on a case-by-case basis.

If the Federal Court decides that the certificate is unreasonable, it is quashed. If the court decides that it is reasonable, the certificate becomes an order for removal of the person. The court's decision can't be appealed.

Since 1978, security certificates have been issued 28 times. The latest use was in November 2006 in the arrest of an alleged spy in Montreal."

Seems we issue one per year on average. Not exactly Guantanamo's stats.