Membership revocation is a delicate issue of group signature. Verifier-local revocation (VLR) is a reasonable resolution, especially for mobile environments. Based on the DDH and q-SDH assumption, we propose a new V...
NKBRSF19990754 and National Natural Sciences Foundation under grant 19833010.
We examine 14 plates of the globular cluster M3 (NGC 5272) taken with the 40 cm refractor at the Sheshan station of Shanghai Astronomical Observatory. The plates span over a period of about 77 years. The positions and...