E-wallet allows consumers to store payment information like credit card numbers and personal details in one place, allowing for one-click payments during online checkout. Consumers sign up for an e-wallet service, registering credit cards, and then login at checkout to make purchases. Their billing address is automatically populated from their e-wallet profile for a streamlined purchasing process. Popular e-wallet services mentioned include PayPal, PayPass, OxiCash, .NET Passport, Yahoo Wallet, and Google Wallet.