R. v. Spencer, 2014 SCC 43:
Whether there is a reasonable expectation of privacy in the totality of the circumstances is assessed by considering and weighing a large number of interrelated factors. The main dispute in this case turns on the subject matter of the search and whether the accused's subjective expectation of privacy was reasonable. The two circumstances relevant to determining the reasonableness of his expectation of privacy in this case are the nature of the privacy interest at stake and the statutory and contractual framework governing the ISP's disclosure of subscriber information.
When defining the subject matter of a search, courts have looked not only at the nature of the precise information sought, but also at the nature of the information that it reveals. In this case, the subject matter of the search was not simply a name and address of someone in a contractual relationship with the ISP. Rather, it was the identity of an Internet subscriber which corresponded to particular Internet usage.
The nature of the privacy interest engaged by the state conduct turns on the privacy of the area or the thing being searched and the impact of the search on its target, not the legal or illegal nature of the items sought. In this case, the primary concern is with informational privacy. Informational privacy is often equated with secrecy or confidentiality, and also includes the related but wider notion of control over, access to and use of information. However, particularly important in the context of Internet usage is the understanding of privacy as anonymity. The identity of a person linked to their use of the Internet must be recognized as giving rise to a privacy interest beyond that inherent in the person's name, address and telephone number found in the subscriber information. Subscriber information, by tending to link particular kinds of information to identifiable individuals may implicate privacy interests relating to an individual's identity as the source, possessor or user of that information. Some degree of anonymity is a feature of much Internet activity and depending on the totality of the circumstances, anonymity may be the foundation of a privacy interest that engages constitutional protection against unreasonable search and seizure. In this case, the police request to link a given IP address to subscriber information was in effect a request to link a specific person to specific online activities. This sort of request engages the anonymity aspect of the informational privacy interest by attempting to link the suspect with anonymously undertaken online activities, activities which have been recognized in other circumstances as engaging significant privacy interests.
There is no doubt that the contractual and statutory framework may be relevant to, but not necessarily determinative of whether there is a reasonable expectation of privacy. In this case, the contractual and regulatory frameworks overlap and the relevant provisions provide little assistance in evaluating the reasonableness of the accused's expectation of privacy. Section 7(3)(c.1)(ii) of PIPEDA cannot be used as a factor to weigh against the existence of a reasonable expectation of privacy since the proper interpretation of the relevant provision itself depends on whether such a reasonable expectation of privacy exists. It would be reasonable for an Internet user to expect that a simple request by police would not trigger an obligation to disclose personal information or defeat PIPEDA's general prohibition on the disclosure of personal information without consent. The contractual provisions in this case support the existence of a reasonable expectation of privacy. The request by the police had no lawful authority in the sense that while the police could ask, they had no authority to compel compliance with that request. In the totality of the circumstances of this case, there is a reasonable expectation of privacy in the subscriber information. Therefore, the request by the police that the ISP voluntarily disclose such information amounts to a search.
Whether the search in this case was lawful will be dependent on whether the search was authorized by law. Neither s. 487.014(1) of the Criminal Code, nor PIPEDA creates any police search and seizure powers. Section 487.014(1) is a declaratory provision that confirms the existing common law powers of police officers to make enquiries. PIPEDA is a statute whose purpose is to increase the protection of personal information. Since in the circumstances of this case the police do not have the power to conduct a search for subscriber information in the absence of exigent circumstances or a reasonable law, the police do not gain a new search power through the combination of a declaratory provision and a provision enacted to promote the protection of personal information. The conduct of the search in this case therefore violated the Charter. Without the subscriber information obtained by the police, the warrant could not have been obtained. It follows that if that information is excluded from consideration as it must be because it was unconstitutionally obtained, there were not adequate grounds to sustain the issuance of the warrant and the search of the residence was therefore unlawful and violated the Charter.
The police, however, were acting by what they reasonably thought were lawful means to pursue an important law enforcement purpose. The nature of the police conduct in this case would not tend to bring the administration of justice into disrepute. While the impact of the Charter‑infringing conduct on the Charter protected interests of the accused weighs in favour of excluding the evidence, the offences here are serious. Society has a strong interest in the adjudication of the case and also in ensuring the justice system remains above reproach in its treatment of those charged with these serious offences. Balancing the three factors, the exclusion of the evidence rather than its admission would bring the administration of justice into disrepute. The admission of the evidence is therefore upheld.