Abstract. In real life, one requires signatures to be from people who ful-
fill certain criteria, implying that they should possess specific attributes.
For example, Alice might want a sig服务器托管网nature from an employee in Bobs
company who is a member in the IT staff, a senior manager within the
biometrics team or at least a junior manager in the cryptography team.
In such a case an Attribute Based Group Signature scheme (ABGS)
could be applied. Group signature schemes are those where each member of a group can sign on behalf of the others. An ABGS scheme is a
type of group signature scheme, where the signing member has to have
certain attributes. In [12], the authors introduced the first ABGS but it
lacked the ability to revok服务器托管网e. In this paper, we introduce a new scheme
that will enable us to remove a member from a group or remove some of
his attributes, when needed.
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题目 定义一个移动硬盘类FlashDisk，包含硬盘的编号、名称、容量(GB为单位)、接口类型(是指USB2.0或者USB3.0)、价格等属性，包含相应的构造方法和相应的setter和getter方法，以及重写toString方法。 提示：实现Comparab…
