This article concerned on the study of signature submanifolds for curves under Lie group actions SE(2), SA(2) and for surfaces under SE(3). Signature submanifold is a regular submanifold which its coordinate components are differential invariants of an associated manifold under Lie group action, and therefore signature submanifold is a key for solving equivalence problems.

A secured system process is becoming a tough process to validate the online users. In an online process, normally user name and password is given for user registration. But since this alone is not sufficient for security, biometric identifier, fingerprint is used in registration step using a fingerprint device. In this paper, an additional security parameter, signature using mouse, that is, key...

Voting is a way for a voter to make a decision or express an opinion or to choose a candidate. E-voting (Electronic Voting) refers to both the electronic means of casting a vote and the electronic means of counting and publishing that votes. The E voting system has some specific advantages as compared to the traditional voting system. In this paper, a secure and efficient e-voting protocol is p...

An oo-line electronic cash system is presented that ooers appreciably greater security and better privacy than currently considered electronic cash systems with similar functionality. A tamper-resistant smart card, issued by the bank, controls a counter that represents the amount of electronic cash carried by the user. The use of a counter ensures that the computation and communication complexi...

Multi-user broadcast authentication enables a large number of users to join in and broadcast messages to wireless sensor networks (WSN) dynamically and authentically. Public-key-based schemes have been proposed to provide such services; however, none of them achieve security, scalability and efficiency simultaneously. This paper presents IMBAS, an identity-based multi-user broadcast authenticat...

Blind signature and blind multisignature schemes are useful in protocols that guarantee the anonymity of the participants. In practice, in some cases the electronic messages are to be signed by several signers and an electronic message is first blinded then passed to each of the signers, who then sign it using some special signature scheme such as collective signature protocol. In this paper, w...

It is a common misunderstanding that, in Europe, in order to have a legally valid electronic signature, you need a “qualified” electronic signature. The European Electronic Signatures Directive is very clear in this respect, though: it is forbidden to deny any legal effectiveness to an electronic signature solely on the ground that it is not qualified, for instance because not based on a qualif...