A system and method are provided for storing a data element from a first resource in a queue at a second resource. A combination of a data element X.sub.N+1 and a signature S.sub.Q =S[N] are signed at a first resource to obtain a signature S[X.sub.N+1,S[N]], where N is an integer. The data element data...http://www.google.com/patents/US6237094?utm_source=gb-gplus-sharePatent US6237094 - System and method for using a second resource to store a data element from a first resource in a first-in first-out queue
