关键词: 临近空间, 切换安全, 安全切换, 信任传递

Abstract: The near-space network has become of research focus with rapid developing of space network.With characteristic of high exposure，dynamic establishing net，finity capability of calculate，near-space network demand higher real time，security.This thesis put forward a security-handoff of near-space network，introduce the definition and meaning of security-handoff，and analyse the difference compare of tradition handoff，security handoff，and handoff-security.This thesis also design the selection arithmetic of MPHR and trust transfer mechanism，that realize handoff of security channel and continuity of security communication，and that can ensure security and advance efficiency of handoff.

Key words: near-space, security-handoff, handoff-security, trust transfer