# US 10,771,507 B2 · Secure communication method of IMS system based on key file

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- Number: US 10,771,507 B2
- Document ID: US10771507B2
- Status: Granted
- Kind: B2
- Application number: 16/132,171
- Filed: 2018-09-14
- Published: 2020-01-16
- Granted: 2020-09-08
- Earliest claimed: 2018-07-10
- Assignees: AnKang HENTE Technology Co., Ltd.
- Applicants: AnKang HENTE Technology Co., Ltd
- Inventors: Lihong Hao; Jiuchang Qin; Yuanlin Ma
- Web page: https://patentgrep.com/patent/US10771507B2

## CPC

- H04L 65/1016: IP multimedia subsystem [IMS]
- H04L 63/06: {for supporting key management in a packet data network (cryptographic mechanisms or cryptographic arrangements for key management H04L9/08)}
- H04L 63/08: {for authentication of entities (cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32)}
- H04L 65/1073: Registration or de-registration
- H04W 12/06: Authentication
- H04W 12/069: using certificates or pre-shared keys
- H04L 63/083: {using passwords (cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226)}
- H04W 12/63: Location-dependent; Proximity-dependent
- H04W 12/71: Hardware identity
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Disclosed is a secure communication method of an IMS system based on a key file. The method includes obtaining an IMS account before sending the account and authentication information to a background server by a UE; generating an electronic work order by the background sever according to the received authentication information to enable customer service personnel to manually audit the authentication information and the IMS account according to a preset rule and the electronic work order; generating an encrypted key file and sending the file to the UE when determining the correctness of the authentication information and the IMS account; and activating the IMS account according to the key file and performing network communication according to the IMS account. The disclosure improves the communication security of the IMS system by using the activated IMS account for network communication.

## Claims

### Claim 1

A secure communication method of an IMS (IP Multimedia Subsystem) system based on a key file, comprising the following steps:
obtaining an IMS account by a UE;
sending the IMS account and authentication information to a background server by the UE;
generating an electronic work order by the background server according to the received authentication information to enable customer service personnel to manually audit the authentication information and the IMS account according to a preset rule and the electronic work order;
generating a key file by the background server according to the IMS account, the authentication information and UE information and sending the key file to the UE when determining that the IMS account and the authentication information are correct;
adding the IMS account, an IMS account password, the UE information and attribute information of the background server to the key file; and
activating the IMS account by the UE according to the key file and performing network communication according to the IMS account.

### Claim 2 (depends on 1)

The secure communication method of the IMS system based on the key file according to claim 1, wherein after the UE activates the IMS account according to the key file and performs network communication according to the IMS account, the method further comprises:
sending verification information to the background server by a new UE;
matching the received verification information with contents in the authentication information by the background server, generating a new key file when determining that the verification information matches the contents in the authentication information, and sending the new key file to the new UE;
adding the IMS account, the IMS account password, new UE information and the background server attribute information to the new key file; and
activating the IMS account by the new UE according to the new key file and performing network communication according to the IMS account.

### Claim 3 (depends on 2)

The secure communication method of the IMS system based on the key file according to claim 2, wherein the UE comprises a user's mobile phone;
obtaining the IMS account by the UE comprises:
obtaining an IMS account selected by a user from an IMS account list by the user's mobile phone; and
sending the IMS account and authentication information to the background server by the UE comprises:
sending the IMS account, user identity information and user password information to the background server by the user's mobile phone.

### Claim 4 (depends on 3)

The secure communication method of the IMS system based on the key file according to claim 3, wherein the UE information comprises software ID information, hardware information and geographic location information of the user's mobile phone; the software ID information of the user's mobile phone comprises an IP address and a domain name of the user's mobile phone; and the hardware information of the user's mobile phone comprises IMEI, MEID, or a hard disk.

### Claim 5 (depends on 2)

The secure communication method of the IMS system based on the key file according to claim 2, wherein the UE comprises a computer;
obtaining the IMS account by the UE comprises:
obtaining an IMS account corresponding to a contract number by the computer; wherein the contract number is a code specified by a computer manufacturer and an IMS company;
sending the IMS account and authentication information to the background server by the UE comprises:
sending the IMS account and hardware information of the computer to a background server by the computer;
wherein the hardware information of the computer comprises hard disk information of the computer and a MAC address of the computer.

### Claim 6 (depends on 5)

The secure communication method of the IMS system based on the key file according to claim 5, wherein the UE information comprises software ID information and geographic location information of the computer; and the software ID information of the computer comprises an IP address and a domain name of the computer.

### Claim 7 (depends on 1)

The secure communication method of the IMS system based on the key file according to any one of claim 1, wherein the background server attribute information comprises an IP address, domain name information and authentication information of the background server, and an IP address and domain name information of a backup background server.