Because the current time is often used in cryptographic syst

Because the current time is often used in cryptographic systems, find a product or system that uses (or should use) a clock, give a short summary of the technology’s security by focusing on the security and privacy issues surrounding the clock.

Solution

As far as your concern about a time variant technology which focuses on securiety and privacy issues surrounding the clock then there is a highly secure constraint is avilable known as OTP(One Time Password)

A one-time password (OTP) is a password that is valided for only single login transaction or single session, on a computer system or other digital device. OTP’S help us to remove many negative constraints associated with traditional (static) password-based authentication; a number of implementations also incorporate two factor authentication by ensuring that the one-time password requires access to something an individual who are loging has ie- phone number, mail id etc   as well as something a person knows (such as a PIN).

The most useful service provided by otp is to remove chances of replay attacks. This means that a potential intruder who manages to record an OTP that was already used to log in to a service or to conduct a transaction will not be able to fake fully acquire it, since it will no longer be valid. Another advantage is that a user who uses the same (or similar) password for multiple systems, is not made vulnerable on all of them, if the password for one of these is gained by an attacker. A number of OTP systems also aim to ensure that a session cannot easily be intercepted or impersonated without knowledge of unpredictable data created during the previous session, thus reducing the attack surface further.Also ,Otp helps to remove chances of phishing attacks as the otp enterd is no longer valid for next transaction .Some of the well known android and ios apps are using this methodology as well as many websites like Amazon,paytm also uses this methodology.