KEY EXCHANGE METHOD AND APPARATUS

摘要

Embodiments of the present invention disclose a key exchange method and apparatus, which relate to the communications field, and can enable user equipments establishing a D2D link to share a set of keys, and further, information security can be achieved when a user equipment transmits service data or a signaling message through a Ud interface. A specific solution is that: a network device acquires a first key, and sends a message including the first key to a second user equipment, so that the second user equipment uses, when communicating with a first user equipment by using a D2D link, the first key to protect transmitted information. The present invention is applicable to an exchange process of keys for protecting data on a D2D link.

主权项

1. A key exchange method, wherein a device to device (D2D) link is established between a first user equipment and a second user equipment, and the method comprises:
acquiring, by a network device, a first key; and sending, by the network device, a message comprising the first key to the second user equipment, so that the second user equipment uses, when communicating with the first user equipment by using the D2D link, the first key to protect transmitted information.