Method of providing sns-group inviting service and sns server therefor

A method for registering a device to a server, the method comprising:

• receiving, by the server, device information of a second device from a first device, the first device having been registered to the server;
• transmitting, if the device information of the second device is received, first information for authentication of the second device to the second device;
• receiving second information for authentication of the second device from the second device;
• comparing the first information with the second information;
• and
• registering the second device in association with the first device if the first information corresponds to the second information.

A method for registering a device to a server, the method comprising:

• connecting a second device to a first device, the first device having been registered to the server;
• transmitting, by the second device, device information of the second device to the first device;
• receiving first information for authentication of the second device based on the device information of the second device from the server;
• and
• transmitting second information for authentication of the second device to the server if the first information for authentication of the second device is received.