The authors found that although the amount of lower eyelid fat varies greatly between individuals, the process of lower eyelid fat herniation does occur. It retains a steady incline after the third decade of life and slows at approximately age 70. In the authors' study, ocular globe position appears unrelated to this process of herniation.
Group undeniable signatures are like ordinary group signatures except that verifying signatures needs the help of the group manager. In this paper, we propose a convertible group undeniable signature scheme in which the group manager can turn all or selective signatures, which are originally group undeniable signatures, into ordinary group signatures without compromising security of the secret key needed to generate signatures. The proposed scheme also allows the group manager to delegate the ability to confirm and deny to a limited set of parties without providing them the capability of generating signatures. For business applications, convertible group undeniable signatures can be widely used to validate price lists, press release or digital contracts when the signatures are commercially sensitive or valuable to a competitor. Our scheme is unforgeable, signature-simulatable and coalition-resistant. The confirmation and denial protocols are also zero-knowledge. Furthermore, the time, space and communication complexity are independent of the group size.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.