| 主权项 |
1. A system for storing receipts comprising:
a cloud server coupled to a network; a first merchant register coupled to a first reader at a first merchant, the first reader configured for receiving identification information about a user from a smartphone of the user, the first merchant register having a first encryption scheme for encrypting a first receipt from a first purchase transaction by the user, the first merchant register transmitting the encrypted first receipt through the network to the cloud server; and a second merchant register coupled to a second reader at a second merchant, the second reader configured for receiving the identification information about the user from the user's smartphone, the second merchant register having a second encryption scheme, different than the first encryption scheme, for encrypting a second receipt from a second purchase transaction by the user, the second merchant register transmitting the encrypted second receipt through the network to the cloud server; wherein the cloud server stores the encrypted first receipt and the encrypted second receipt, the cloud server transmits the encrypted first purchase data receipt and the encrypted second receipt to the user's smartphone, and wherein the first merchant register and the first reader cannot read the encrypted second receipt and the second merchant register and the second card reader cannot read the encrypted first receipt. |
