function, and including s and t in the certificate....http://www.google.com/patents/US7340606?utm_source=gb-gplus-sharePatent US7340606 - Digital certificatesAdvanced Patent SearchPublication numberUS7340606 B2Publication typeGrantApplication numberUS 10/545,737PCT numberPCT/IL2003/001108Publication dateMar 4, 2008Filing dateDec 29, 2003Priority dateJun 23, 2003Fee statusPaidAlso published asCN177