| 摘要 |
<p>The present invention discloses an update method for air interface key and a radio access system. In which, the update method for air interface key includes that a core network node receives a relocation completion indication message from a destination radio network controller (RNC) (S502), the relocation completion indication message indicates the success of a user equipment relocation from a source RNC to the destination RNC; the core network node calculates a next tap deformation intermediate key by using a stored conventional integrity key (IK) and a stored conventional ciphering key (CK) (S504); and the core network node sends the next tap deformation intermediate key to the destination RNC (S506). By the present invention, when a serving radio network controller (SRNC) relocates, the different deformation intermediate keys are used by the source RNC and the destination RNC, and the forward security of the user is ensured, thereby the communication security of the radio access system is improved integrally.</p> |
