A computer-based method includes receiving, at a computer-based authorization system, a request to authorize payment to a first party at an electronic payment device from an account with funds that have been paid by a second party. The request includes an encrypted indication of an account number that corresponds to the account and a cash card number entered by the first party at the electronic payment device. The method further includes deriving an unencrypted version of the account number from the encrypted indication; comparing the unencrypted version of the account number to one or more identification codes in an electronic database, where one of the identification codes corresponds to the account; and authorizing payment from the account at the payment device based, at least in part, on whether the comparing yields a match between the unencrypted version of the account number and the identification code that corresponds to the account.