Patent attributes
A method includes: receiving a service participation request of a target service transmitted by a user terminal, wherein the user terminal comprises an iOS operating system; obtaining target identification data from a system server according to the service participation request, wherein the target identification data comprises first identification data used for identifying whether the user terminal participates in the target service, and/or second identification data used for identifying whether the device data of the user terminal is modified, and the system server is a server corresponding to the iOS operating system; and according to the target identification data, determining whether to allow the user terminal to participate in the target service.