Visa International Service Association

Christopher Dean

Christian Aabye

Quan Wang

Jerry Wald

Yobel Muchang

Mayank Somaiya

Encryption key exchange processes are disclosed. A disclosed method includes initiating communication between a portable communication device including a token and a first limited use encryption key, and an access device. After communication is initiated, the portable communication device receives a second limited use key from a remote server via the access device. The portable communication device then replaces the first limited use key with the second limited use key. The second limited use key is thereafter used to create access data such as cryptograms that can be used to conduct access transactions.

Encryption key exchange process using access device

Provided is a wearable device, including a base configured to be worn by a user, at least one data element at least partially positioned on or within the base and programmed or configured to have account data stored thereon, and at least one antenna including an open circuit, the at least one antenna at least partially positioned on or within the base and configured to transmit at least a portion of the account data and receive at least a portion of transaction data from at least one target device when the open circuit of the antenna is closed and becomes powered by at least one power source. Other expressions are also disclosed.

Growing community of inventors

Foster City, CA, United States of America

Christopher Dean