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The Petname Tool can help you keep track of these cryptographic identifiers by letting you attach reminder notes to them. Before exchanging sensitive information with a site, you type in a name that will help you remember the site. From then on, whenever your browser is securely connected to that site, your name for it will be displayed. After following a hyperlink, just check that the Petname Tool is displaying the expected name. If so, the Petname Tool has checked that the cryptographic identifiers are also the expected ones.