	US 12,105,825 B2
	Systems and methods for use in securing backup data files
Bryn Anthony Robinson-Morgan, Mosborough Village (GB); Liang Tian, Rye Brook, NY (US); and Prashant Sharma, Madison, NJ (US)
Assigned to MASTERCARD INTERNATIONAL INCORPORATED, Purchase, NY (US)
Filed by MASTERCARD INTERNATIONAL INCORPORATED, Purchase, NY (US)
Filed on Oct. 18, 2023, as Appl. No. 18/381,588.
Application 18/381,588 is a continuation of application No. 17/462,513, filed on Aug. 31, 2021, granted, now 11,822,686.
Prior Publication US 2024/0045982 A1, Feb. 8, 2024
Int. Cl. G06F 21/62 (2013.01); G06F 11/14 (2006.01); G06F 21/32 (2013.01); G06F 21/60 (2013.01); G06F 21/78 (2013.01); G06F 21/10 (2013.01)

CPC G06F 21/6218 (2013.01) [G06F 11/1464 (2013.01); G06F 11/1469 (2013.01); G06F 21/32 (2013.01); G06F 21/602 (2013.01); G06F 21/78 (2013.01); G06F 21/107 (2023.08)]

18 Claims

1. A computer-implemented method for use in securing a backup data file, the method comprising:

receiving, by a mobile device, a request to backup a data file;

generating, by the mobile device, an L4 key;

for each contact attribute of the data file:

generating, by the mobile device, an L3 file including the L4 key and an identifier associated with a user; and

encrypting, by the mobile device, the L3 file with an un-masked version of the contact attribute;

compiling, by the mobile device, the encrypted L3 file(s) and the masked version(s) of the contact attribute(s) into an L2 file;

generating, by the mobile device, an L2 key;

encrypting, by the mobile device, the L2 file with the L2 key;

compiling, by the mobile device, the encrypted L2 file and L2 key into an L1 file;

generating, by the mobile device, an L1 key;

encrypting, by the mobile device, the L1 file with the L1 key;

compiling, by the mobile device, an L4 file to include multiple identity attributes of the user;

encrypting, by the mobile device, the L4 file with the L4 key;

combining, by the mobile device, the encrypted L4 file and the encrypted L1 file;

signing, by the mobile device, the combination of the encrypted L4 file and the encrypted L1 file with a private key;

compressing, by the mobile device, the combined L4 and L1 files; and

storing, by the mobile device, the compressed files in a storage device apart from the mobile device.