Group signatures, introduced by Chaum and van Heijst, allow members of a group to sign messages anonymously on behalf of the group. Only a designated group manager is able to identify the group member who issued a given signature. Many applications of group signatures, for example, electronic market, require that the group manager can be split into a membership manager and a revocation manager....

It has been suggested that moral courage in the workplace supports more robust application of regulatory principles. A workforce with to act on imperative, it is argued, can bolster corporate governance and promote both stable business organisations greater economic stability at large. Research area investigates bases courage, a central implication being businesses should invest ethical trainin...