Visa International Service Association

Tirtha Mauli Sarkar

Michael Steven Bankston

Gourab Basu

Ilker Celikyilmaz

Kalpana Jogi

Raman Chinnappan

Rajib Maitra

Darpan Dewan

Sivakumar Seshappan

Thoithoi Chingakham

Kriti Ranjan Das

A method including receiving, by a server computer, a request message from a token requestor computer on behalf of a user device. The request message comprising a first current token tracking value and a first function index value. The server computer can determine a second function index value. The server computer can then compare the first function index value to the second function index value. If the first function index value and the second function index value match, the server computer can determine a function based on the first function index value and a stored function table associated with the user device. The server computer can then determine a second current token tracking value based on the function, then compare the first current token tracking value to the second current token tracking value. The server computer can generate a response message in response to the comparing.

Prevention of token authentication replay attacks system and method

A system and method includes an authorization request message configured with information about transaction amounts of items aggregated according to item categories and applicable rates for the items in the respective categories. Based on the information provided in the authorization request, a transaction handler is configured to compute a modified transaction amount for the transaction by reducing the transaction amount of items in one or more of the categories, without reducing the transaction amount(s) of items in one or more other categories, and computing a total transaction amount based on the reduction and the applicable rates.

Systems and methods using a data structure summarizing item information in authorization request messages for communication in transactions involving multiple items

Systems and methods for transferring resource access from a sender to a recipient are disclosed that can allow a sender to specify an amount of a resource to provide access to (e.g., an amount of money or an amount of access rights), while still providing security for the sender's sensitive credential information (e.g., PAN and/or PIN). These systems and methods can allow a sender to transfer resource access from any location and at any time of the day. In the case of money transfers, the recipient can quickly and directly obtain the money from any ATM location associated with any bank and at any time of the day, even without a bank account.

Systems and methods for transferring resource access

Growing community of inventors

Singapore, Singapore

Tirtha Mauli Sarkar