Privacy is guaranteed through encryption.
Although information can still be intercepted by a third party they will be unable to read them as they have no access to the encryption key. Integrity is also ensured through encryption. If information is received that will not decrypt properly then the recipient knows that the information has been tampered with during transmission. Authentication is provided through digital certificates. Digital certificates provide the basis for secure electronic transactions as they enable all participants in a transaction to quickly and easily verify the identity of the other participants.