intrusion resilient technique can powerfully defend the threat of key exposure.A new tree based intrusion resilient signature scheme (TBIRS) was proposed
and the correctness and security of TBIRS were testified. In the TBIRS
the pre order traversal of binary tree was applied to the key updating
random number was adopted in the key refreshing and the leaves were time periods. As compared with the most secure SiBIR scheme to date
TBIRS can achieve the same key security
but the algorithm complexity reduces from O(N) to O(logN).