A credit card with an obscurable account identifier. The credit card further comprises a substrate defining a first surface with a chromogenic feature wherein the chromogenic feature is capable of changing from a first state and a second state based on an activating trigger. In the first state, the chromogenic feature appears with a first optical property that obscures the account identifier, and in the second state, the chromogenic feature appears with a second optical property that reveals the account identifier.

A card can include a processor; memory accessible to the processor; and instructions stored in the memory and executable by the processor to: decrypt a private key of a payor stored in memory of the card, where the private key is associated with digital cryptocurrency; use the decrypted private key to generate a signed message to transfer the digital cryptocurrency to an address of a payee; and output the signed message.

Methods, systems, and articles of manufacture for providing user participatory design as a process to generate unique patterns on transaction cards are disclosed. For example, a system for providing an interactive design environment for designing a transaction card is disclosed. Accordingly, the system may provide for deeper customization of transaction cards through generative patterns curated by designers and informed by end-users. As a result, the patterns on transaction cards may be unique to every user, and these unique patterns may provide additional security functions to cardholders.

A transaction card includes a first full thickness portion and a second, reduced thickness portion. Each of the first and second portions includes a top surface and an opposing bottom surface spaced from the top surface by a thickness of the card. The first, full thickness portion includes an extent of the card that remains exposed when the card is inserted into a pocket of a card-carrying case, and a feature deviating from a flat region along at least one of the top surface and the opposing bottom surface of the card. The feature is configured for tactile engagement to facilitate removal of the card from the pocket.

A portable device uses a microphone to listen to ambient audio, ascertains a corresponding identifier, and uses the identifier to enable one or more further functions. One of these can be internet search. Such functionality can also be based on digital datawithout requiring a microphone-equipped device.

A transaction card includes a first full thickness portion and a second, reduced thickness portion. Each of the first and second portions includes a top surface and an opposing bottom surface spaced from the top surface by a thickness of the card. The first, full thickness portion includes an extent of the card that remains exposed when the card is inserted into a pocket of a card-carrying case, and a feature deviating from a flat region along at least one of the top surface and the opposing bottom surface of the card. The feature is configured for tactile engagement to facilitate removal of the card from the pocket.

A credit card with an obscurable account identifier. The credit card further comprises a substrate defining a first surface with a chromogenic feature wherein the chromogenic feature is capable of changing from a first state and a second state based on an activating trigger. In the first state, the chromogenic feature appears with a first optical property that obscures the account identifier, and in the second state, the chromogenic feature appears with a second optical property that reveals the account identifier.

A transaction card includes a first full thickness portion and a second, reduced thickness portion. Each of the first and second portions includes a top surface and an opposing bottom surface spaced from the top surface by a thickness of the card. The first, full thickness portion includes an extent of the card that remains exposed when the card is inserted into a pocket of a card-carrying case, and a feature deviating from a flat region along at least one of the top surface and the opposing bottom surface of the card. The feature is configured for tactile engagement to facilitate removal of the card from the pocket.

Methods, systems, and articles of manufacture for providing user participatory design as a process to generate unique patterns on transaction cards are disclosed. For example, a system for providing an interactive design environment for designing a transaction card is disclosed. Accordingly, the system may provide for deeper customization of transaction cards through generative patterns curated by designers and informed by end-users. As a result, the patterns on transaction cards may be unique to every user, and these unique patterns may provide additional security functions to cardholders.

A credit card with an obscurable account identifier. The credit card further comprises a substrate defining a first surface with a chromogenic feature wherein the chromogenic feature is capable of changing from a first state and a second state based on an activating trigger. In the first state, the chromogenic feature appears with a first optical property that obscures the account identifier, and in the second state, the chromogenic feature appears with a second optical property that reveals the account identifier.