The patent application describes the backend for an e-wallet system that would let people securely pay for items on the go via their mobile phones.
Weakness in a component that generates random numbers leaves Android-based digital wallets susceptible, Bitcoin developers warn.
Outlined in a newly-published patent application, Apple's system would give people credits they can use to purchase real goods and services.
Boost has tested the service in three markets, and plans to roll out the service to the entire country by the end of the year.
The iPhone maker may tap into NFC or a different technology to cook up a digital wallet for iOS users, says analyst Gene Munster.
The chief executive says credit card firms should be able to charge fees to companies that are operating digital wallet services.
Digital wallets from Square, Visa, MasterCard, and others have a major perception problem, a study from ComScore finds.
According to the company, over 50 financial institutions have adopted the payment service, which will compete with Google Wallet, PayPal and other offerings from mobile carriers.
Starting next year, merchants will be able to accept PayPal payments if they have an existing relationship with Discover's payment network.
A new digital wallet seeks to replace the collection of bank cards kept in your wallet — as well as any loyalty cards — with a combination of technologies.