Abstract: A device can include an elastic membrane; an array that includes translatable elements extendable to elastically deform the elastic membrane to form a customizable arrangement of discrete keys; and sensor circuitry that senses actuation of each of the discrete keys.

Abstract: A method for supplying a controlled payment number for use on behalf of a tokenized payment account in a digital wallet for e-commerce includes: receiving, by a wallet server, at least a token identifier from an external computing device, the token identifier being associated with a tokenized payment account in the external computing device; transmitting, by the wallet server, at least the token identifier and a request flag to a processing server; identifying, by the processing server, a transaction account number associated with the token identifier, wherein the transaction account number corresponds to the payment account; identifying, by the processing server, a controlled payment number corresponding to the payment account; receiving, by the wallet server, the identified controlled payment number from the processing server; and transmitting, by the wallet server, the identified controlled payment number to the external computing device.