secret is one of the key notions in studying the content of ibn 'arabi's mysticism. secret is a divine bounty which conferred upon the creatures by god and indicates a path stretching byond the reason. as an extension of secret god can be experienced by the mystic. of course undestanding god is a matter of faith and intuition and does not fit the medium of reason. the limits of langua...

A new construction is described for designing secret-key certiicate schemes based on signature schemes other than of the Fiat-Shamir type. Also described are practical secret-key certiicate issuing protocols that enable the Certiication Authority to certify public keys, without being able to compromise the conndentiality of the corresponding secret keys. Furthermore the design of secure showing...

Anonymous secret sharing schemes allow a secret to be recovered from shares regardless of the identity of shareholders. Besides being interesting in its own right, this property is especially appealing to guarantee the anonymity of participants when secret sharing is used as a building block of more general distributed protocols (e.g. to anonymously share the secret key corresponding to a publi...

A dynamic (t, n)-threshold secret sharing scheme based on factorization is proposed in this paper. It has following properties: (1) the dealer can renew the secret key of the system without renewing the shadows of the participants; (2) when some participants’ shadows are revealed, they can be renewed without any effect on the others; (3) a new shadow can be generated for a new participant witho...

In this paper, a new multi authority electronic voting scheme based on elliptic curves is proposed. According to the proposed scheme, each voter casts the vote as a point on the elliptic curve and the final tally is computed with the assistance of multiple authorities. A trusted center is involved in the scheme to distribute the shared secret key among the authorities and the Shamir (t, n) thre...

In a self-healing key distribution scheme a group manager enables a large and dynamic group of users to establish a group key over an unreliable network. The group manager broadcasts in every session some packet of information in order to provide a common key to members of the session group. The goal of self-healing key distribution schemes is that, even if the broadcast is lost in a certain se...

The constrained resources of sensors restrict the design of a key management scheme for wireless sensor networks (WSNs). In this work, we first formalize the security model of ALwEN, which is a gossipbased wireless medical sensor network (WMSN) for ambient assisted living. Our security model considers the node capture, the gossip-based network and the revocation problems, which should be valuab...

We improve a secret sharing scheme, which enables users select their personal keys by themselves instead of being distributed by group manager and users can reuse their personal keys no matter the shared secret is renewed or recovered. Then we apply it to design a self-healing key distribution scheme. The new scheme achieves good properties. Firstly, the scheme reduces storage overhead of perso...