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|1. (WO2018076799) METHOD FOR DISTRIBUTING KEY, RELATED DEVICES AND SYSTEM|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||METHOD FOR DISTRIBUTING KEY, RELATED DEVICES AND SYSTEM|
Provided in the present application is a method for distributing a key, comprising: a key management system (KMS) receiving a key request transmitted by a mobile network operator (MNO), the key request carrying the public key of user equipment (UE); allocating, to the UE, at least one public validation token (PVT) and one secret signing key (SSK) of identity based cryptography (IBC); according to the public key of the UE, encrypting said at least one PVT and said one SSK to generate ciphertext; according to a preset digital SSK, signing a to-be-signed object to generate a digital signing, the to-be-signed object comprising the public key of the UE and the ciphertext; determining the signing validation token associated with the digital SSK; returning a key response to the MNO, the key response carrying the signing validation token, the public key of the UE, the ciphertext and the digital signing. Further provided in the embodiments of the present invention are a UE, an MNO, a KMS and a misbehavior detection management function. Using the present invention, the identity information and communication key of a user are separately stored, achieving good security.