Abstract: A system and method for currency validation of a bank note with a radio frequency identification device therein utilizes a computer, server and communication link and a smartphone including an RFID reader, transmitter/receiver and an internet connection. A bank note is issued with a value, a serial number and a secret seed message that is also saved on the issuer's server. A tamper proof RFID mu-chip is embedded in the currency note and includes the value, serial number, plus the secret message for making a calculation. The smartphone reads the information on the chip and requests an issuer/authenticator to validate the note. The issuer/authenticator transmits a challenge and the mu-chip calculates an answer that is sent to the issuer/authenticator. An approval or disapproval is then sent to the smartphone.

Abstract: Systems and methods for One-Time Password (OTP) authentication with infinite nested hash chains are described. In one aspect, a methodology includes a client device that provides a one-time password (OTP) authentication server with certain registration information. The client device generates, via the OTP authentication server, an authenticated OTP with infinite nested hash chains, These generating operations use a first hash function (hA (?)) for updating a seed chain, a second hash function (hB (•)) for OTP production, an OTP seed number stOTP for a tth authentication, and two authentication seeds of numbers s2t?1Auth and s2tAuth, for the tth authentication.

Abstract: A system and method for currency validation of a bank note with a radio frequency identification device therein utilizes a computer, server and communication link and a smartphone including an RFID reader, transmitter/receiver and an internet connection. A bank note is issued with a value, a serial number and a secret seed message that is also saved on the issuer's server. A tamper proof RFID mu-chip is embedded in the currency note and includes the value, serial number, plus the secret message for making a calculation. The smartphone reads the information on the chip and requests an issuer/authenticator to validate the note. The issuer/authenticator transmits a challenge and the mu-chip calculates an answer that is sent to the issuer/authenticator. An approval or disapproval is then sent to the smartphone.

Abstract: Systems and methods for One-Time Password (OTP) authentication with infinite nested hash chains are described. In one aspect, a methodology includes a client device that provides a one-time password (OTP) authentication server with certain registration information. The client device generates, via the OTP authentication server, an authenticated OTP with infinite nested hash chains, These generating operations use a first hash function (hA (?)) for updating a seed chain, a second hash function (hB (•)) for OTP production, an OTP seed number stOTP for a tth authentication, and two authentication seeds of numbers s2t?1Auth and s2tAuth, for the tth authentication.