The main goal of narrating the password-management protocol is to reduce the prevalent attacks on cyber-physical systems such as the hacking of databases of User-ID-Password pairs and side-channel analysis. The architecture uses a hash function to hash the password and user ID has weakness can help to crack the password. So, the architecture utilizes both hash function and the Addressable Physical unclonable function (PUF) Generator (APG) to authenticate clients on the network without keeping the real format of passwords in the database. The hash function and APG together are more difficult to attack because they are unclonable, have a high level of randomness, and do not depend on storing information. This paper shows a simulation prototype for how the password manager protocol can work depending on the SHA-3-512 and SRAM PUF. Furthermore, the paper shows how to encrypt the database content of password manager by using the SRAM PUF and provides a software solution of the noise of SRAM PUF to reduce the rate of false rejections for the real user and false acceptance for the not existing user.