Electronics and Telecommunications Research Institute

Hye Ran Moon

Jung Yeon Hwang

Young Ho Kim

Hyun Sook Cho

Sang Woo Lee

Byung Ho Chung

Yun Kyung Lee

Sin Hyo Kim

Sok Joon Lee

There is provided an anonymous service method of providing local linkability. The anonymous service method providing local linkability according to exemplary embodiments of the invention, an anonymous authentication operation based on a short group signature is performed, for which the concept of a local linkability is introduced to secure linkability within the same service domain. Namely, in the interior of a service provider, a virtual index having a fixed value is calculated for each service user, and in this case, although a plurality of service providers collude with each other, they cannot calculate a virtual index having the same value, whereby the linkability can be secured within the same service domain but not within the interiors of different service domains.

Anonymous authentication service method for providing local linkability

Growing community of inventors

Daejeon, South Korea

Hye Ran Moon