Article 5 of the European Convention on Human Rights (Art.5 ECHR for short) provides that everyone has the right to liberty and security of person. Liberty and security of the person are taken as a "compound" concept - security of the person has not been subject to separate interpretation by the Court.
Article 5 provides the right to liberty and security, subject only to lawful arrest or detention under certain other circumstances, such as arrest on suspicion of a crime or imprisonment in fulfilment of a sentence. The article also provides the right to be informed in a language one understands of the reasons for the arrest and any charge against them, the right of prompt access to judicial proceedings to determine the legality of one's arrest or detention and to trial within a reasonable time or release pending trial, and the right to compensation in the case of arrest or detention in violation of this article.