Constant-Size Dynamic $k$-Times Anonymous Authentication

Dynamic k-Times Anonymous Authentication

k-times anonymous authentication (k-TAA) schemes allow members of a group to be anonymously authenticated by application providers for a bounded number of times. k-TAA has application in evoting, e-cash, electronic coupons and anonymous trial browsing of content. In this paper, we extend k-TAA model to dynamic k-TAA in which application providers can independently grant or revoke users from the...

Efficient Dynamic k-Times Anonymous Authentication

In k-times anonymous authentication (k-TAA) schemes, members of a group can be anonymously authenticated to access applications for a bounded number of times determined by application providers. Dynamic k-TAA allows application providers to independently grant or revoke group members from accessing their applications. Dynamic kTAA can be applied in several scenarios, such as k-show anonymous cr...

k-Times Anonymous Authentication with a Constant Proving Cost

A k-Times Anonymous Authentication (k-TAA) scheme allows users to be authenticated anonymously so long as the number of times that they are authenticated is within an allowable number. Some promising applications are e-voting, e-cash, e-coupons, and trial browsing of contents. However, the previous schemes are not efficient in the case where the allowable number k is large, since they require b...

k-Times Anonymous Authentication (Extended Abstract)

We propose an authentication scheme in which users can be authenticated anonymously so long as times that they are authenticated is within an allowable number. The proposed scheme has two features that allow 1) no one, not even an authority, identify users who have been authenticated within the allowable number, and that allow 2) anyone to trace, without help from the authority, dishonest users...

A Selectable k-Times Relaxed Anonymous Authentication Scheme