The dissertation has better try and exploration. Based on the famous RSA assumption and decisional Diffie-Hellman assumption, we propose several new group signature schemes, dynamic group signature schemes and group blind signature schemes respectively by ElGamal encryption, Rabin encryption and signature of knowledge.
New group contribution correlations, which are based on systematical evaluation of critical data, for estimating critical properties have been proposed with contribution values of groups. The average deviations of T C,P C,V C are 0.76%, 4.25% and 2.33%respectively, and that are lower than those by Joback′s method chosen for comparison.
For the R/S analysis of the calculated Hurst exponents, a new group of Hurst exponent H 1, i.e., Hurst exponent of Hurst exponent, and related ΔH 1, can be reached, the rest high order Hurst exponent and related difference H 2,ΔH 2,H 3,ΔH 3 and the like may be deduced by analogy.
Specific cyclooxygenase-2(COX-2) inhibitors constitute a new group of non-steroidal antiin-flammatory drugs (NSAIDs) which, at recommended doses, block prostaglandin production by cyclooxygenase-2, but not by cyclooxygenase-1. COX-2 inhibitors act rapidly in providing pain relief and their anti-inflammatory analgesic effect in osteoarthntis and rheumatoid arthritis is equivalent to standard doses of non-selective NSAIDS.
WT5"BZBased on RSAsignature scheme and ELGamal cryptosytem,a new group signa-ture scheme is proposed by making use of proof of knowledge.This scheme is secure under the RSA and the Decision Diffie-Hellman assumptions.
present a scheme of key management based time-structure tree, which adopts periodic rekeying mechanism and distributes new group keys through secure filter. This method decreases the number of messages when rekeying greatly, thus enhances its efficiency and makes it reliable.
All operations can be performed only via unicast and multicast. During the re-keying each group member modifies the path information with the received path update information to compute the new group key.