Abstract: In a key management method performed by a terminal, a device key including a device public key and a device private key is generated in a security zone. A local device parameter and the device public key are transmitted to a certificate authentication server. A device certificate fed back by the certificate authentication server is received by the terminal. The signature data of the device certificate is generated by signing the device parameter and the device public key by using an authentication private key of the certificate authentication server. The terminal then stores the device private key and the device certificate in the security zone.

Abstract: A computer server of a social communication platform may be configured to provide a social communication platform to a first user to chat with a second user over a window displaying on a computer device of the first user; receive chat messages between the first user and second user, the chat message including a current geographical location information of the first user; select at least one candidate POI associated with the second user and based on the current geographical location information of the first user; send location information of at least one candidate POI to the first user through the window; receive from the first user a selection of a target POI from the at least one candidate POI; and send information associated with the target POI to the first user through the social communication platform.

Abstract: In a key management method performed by a terminal, a device key including a device public key and a device private key is generated in a security zone. A local device parameter and the device public key are transmitted to a certificate authentication server. A device certificate fed back by the certificate authentication server is received by the terminal. The signature data of the device certificate is generated by signing the device parameter and the device public key by using an authentication private key of the certificate authentication server. The terminal then stores the device private key and the device certificate in the security zone.

Abstract: A computer server of a social communication platform may be configured to provide a social communication platform to a first user to chat with a second user over a window displaying on a computer device of the first user; receive chat messages between the first user and second user, the chat message including a current geographical location information of the first user; select at least one candidate POI associated with the second user and based on the current geographical location information of the first user; send location information of at least one candidate POI to the first user through the window; receive from the first user a selection of a target POI from the at least one candidate POI; and send information associated with the target POI to the first user through the social communication platform.

Abstract: A computer server of a social communication platform may be configured to provide a social communication platform to a first user to chat with a second user over a window displaying on a computer device of the first user; receive chat messages between the first user and second user, the chat message including a current geographical location information of the first user; select at least one candidate POI associated with the second user and based on the current geographical location information of the first user; send location information of at least one candidate POI to the first user through the window; receive from the first user a selection of a target POI from the at least one candidate POI; and send information associated with the target POI to the first user through the social communication platform.

Abstract: A computer server of a social communication platform may be configured to provide a social communication platform to a first user to chat with a second user over a window displaying on a computer device of the first user; receive chat messages between the first user and second user, the chat message including a current geographical location information of the first user; select at least one candidate POI associated with the second user and based on the current geographical location information of the first user; send location information of at least one candidate POI to the first user through the window; receive from the first user a selection of a target POI from the at least one candidate POI; and send information associated with the target POI to the first user through the social communication platform.