SSL certificates are digital signatures that websites can use to prove their authenticity and provide their users with privacy, via encryption. Banking websites, Tufts [webmail|https://exchange.tufts.edu/], and many other Tufts services use SSL certificates signed by {link-window:http://en.wikipedia.org/wiki/Certificate_authority|tip=Certificate Authorities at Wikipedia}Certificate Authorities{link-window} (CAs) to prove their identity to browsers (which in turn have been preconfigured to trust a limited set of CAs). | 