公开(公告)号：US20180197362A1

公开(公告)日：2018-07-12

申请号：US15915904

申请日：2018-03-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shang GAO ,  Heng LIAO

IPC: G07C15/00 ,  H04L9/08 ,  G07F17/32

CPC classification number: G07C15/006 ,  G06F7/58 ,  G07C15/00 ,  G07F17/3225 ,  G07F17/329 ,  H04L9/0662 ,  H04L9/0869 ,  H04L9/12

Abstract: The present invention provides a method which includes: receiving, by a first node in a first period of time, n encrypted random parameters sent by n second nodes in a system, where n is a positive integer; receiving, by the first node in a second period of time, n mapping relationships and n keys that are sent by the n second nodes, where each mapping relationship is a one-to-one mapping relationship between an encrypted random parameter and a key; and decrypting, by the first node in a third period of time, the n encrypted random parameters by using the n mapping relationships and the n keys, to obtain a target random parameter set, and generating target winning numbers by using the target random parameter set, so that each node can generate the winning numbers and verify impartiality of the winning numbers, thereby increasing randomness of a random parameter.