In this study, a fail-stop group signature scheme (FSGSS) that combines the features of and signatures to enhance security level original is proposed. Assuming FSGSS encounters an attack by hacker armed with supercomputer, can prove digital forged. Based on aforementioned objectives, study proposes three lemmas proves they are indeed feasible. First, how does recipient digitally signed document...

In the last decades, several signcryption schemes have been developed for different privacy-enhancing purposes. this paper, we propose a new group scheme that provides: unforgeability, confidentiality, ciphertext and sender anonymity, traceability, unlinkability, exculpability, coalition-resistance, unforgeable tracing verification. It is important to notice proposed allows signer anonymously s...

The invariant mass spectrum of the lepton pair in inclusive semileptonic B → Xulν decay yields a model independent determination of |Vub| [1]. Unlike the lepton energy and hadronic invariant mass spectra, nonperturbative effects are only important in the resonance region, and play a parametrically suppressed role when dΓ/dq is integrated over q > (mB − mD) , which is required to eliminate the B...

We briefly review some results in the theory of quantum W3 gravity in the chiral gauge. We compare them with similar results in the analogous but simpler cases of d = 2 induced gauge theories and d = 2 induced gravity. Contribution to the Trieste Summerschool on High Energy Physics and Cosmology, Aug. 1991. Work supported in part by grant NSF-91-08054. This work was supported in part by the Dir...