A Method of Efficient OTP Generation Using Pseudorandom Number Generators

Something you know based authentication method is the most classical authentication technique on the computer system, and is performed more easily and successfully than other methods even it is a vulnerable method against attacks such as eavesdropping or replay attack. To solve this problem, OTP (Onetime Password) technique is used. OTP is delivered from one side to the other in two approaches. In the first approach, OTP is generated on server side and sent to clients, for example, by SMS. In the second approach, OTP is generated on both sides at one time based on shared counter, such as, HOTP. In most cases, one-way hash functions are used in both approaches to generate OTP. As resent researches show the weakness of the hash functions, we need new a new OTP generation algorithms to solve this problem. In this paper, we propose a method of creating one time password based on pseudorandom number generators (PRNG), which they are exist on many systems and programming languages as native.