US 12,297,768 B2
Method and apparatus for securing communications using multiple encryption keys
Kepeng Li, Hangzhou (CN); and Kai Li, Hangzhou (CN)
Assigned to ALIBABA GROUP HOLDING LIMITED, Grand Cayman (KY)
Filed by Alibaba Group Holding Limited, Grand Cayman (KY)
Filed on Apr. 28, 2021, as Appl. No. 17/242,679.
Application 17/242,679 is a continuation of application No. 15/580,829, granted, now 11,002,180, previously published as PCT/CN2016/085216, filed on Jun. 8, 2016.
Claims priority of application No. 201510330914.9 (CN), filed on Jun. 15, 2015.
Prior Publication US 2021/0246824 A1, Aug. 12, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 29/06 (2006.01); F02B 33/18 (2006.01); G06F 21/60 (2013.01)
CPC F02B 33/18 (2013.01) [G06F 21/606 (2013.01)] 39 Claims
OG exemplary drawing
 
1. A method comprising:
sending, by a terminal computing device to a platform, an identifier of an information providing server providing an electronic file;
retrieving, by the terminal computing device, a first encryption key from the information providing server;
encrypting, by the terminal computing device, verification information using the first encryption key;
sending, by the terminal computing device, the encrypted verification information to the platform server; and
receiving, at the terminal computing device, the electronic file from the information providing server via the platform server, wherein information in the electronic file is encrypted using the first encryption key of the information providing server.