Lord of Keys Used to Secure Passwords

An Atmel AVR ATmega168 microcontroller is used to build this system, also known as Lord of Keys, which manages password by securely keeping track of all usernames and passwords.

An LCD display is used by the password manager device to browse through all stored records. The Personal Identification Number (PIN) is entered in a numeric keypad along with alphanumeric data to search for information and add new records. Through a USB interface emulated by software, the connection to a computer can be established without the need for any other external dedicated integrated circuit. A Java Card smart card is used to store the confidential information. Any driver installation is not required when the password manager device is installed on the target computer. It can be used with Windows, Mac OS, and Linux computers using any web browser like Firefox, Netscape, Internet Explorer, and others.

During operation, the user keystrokes when typing in a username and password are emulated by the device. The USB interface that is available in all modern computers is much more convenient to use as compared to using a PS/2 interface which is only available in legacy computers.