A novel group signature scheme without one way hash

The group signatures scheme was introduced by Chaum and van Heijst which allow members of a group to sign messages anonymously on behalf of the whole group. Only a designated Group Manager is able to trace the identify of the group member who issued a valid signature. The group members sign a message with their secret key gsk and produce a signature that cannot be linked to the identities of the signers without the secret key of the manager. The group manager can open the signature to recover the identities of the signers in case of any legal dispute. Group signatures have been widely used in Electronic markets where the sellers are the group members, the buyers are the veriers and the market administrator is the group manager. We aim to propose a group signature scheme that is devoid of any one-way hash function and is based upon the Integer Factorization Problem (IFP). The scheme uses the concept of safe primes to further enhance the security of the scheme. The scheme supports message recovery and hence the overload of sending the message is avoided. The scheme satisfies security properties such as Anonymity (The verier cannot link a signature to the identity of the signer), Traceability (The Group Manager can trace the identity of the signer of any valid signature), Unforgeability (A valid signature cannot be produced without the group secret keys), Exculpability (Neither the GM nor any member can produce a signature on behalf of a group member)

Comparative Study of Performance of CdS, CdSe thin filmCdS-PTh, CdSe-PTh nanocomposite thin films Using SEM-EDXA(Scanning Electron Microscope) and FTIR (Fourier Transform Infrared Spectroscopy)

A comparative study of the performance of nanomaterial CdS, CdSe and nanocomposite CdS-PTh, CdSe-PTh has been made through of SEM-EDXA analysis and FTIR. The results indicate that CdS and CdSe nanocomposite are of uniform size and monodisperse having size less than 200nm.Se presenta un estudio comparativo de la actuación de los nano materiales CdS, CdSe y CdS nano compuestos con la hormona paratiroidea, PTH CdSe a través de SEM-EDXA análisis y FTIR. Los resultados indican que los nano compuestos CdS y CdSe son de tamaño uniforme y mono dispersos de tamaños inferiores a 200nm

DOMAIN BOUNDED ENGLISH TO INDIAN SIGN LANGUAGE TRANSLATION MODEL

This is a proposal for the English text to Indian Sign Language translation model wherein the system will accept the input text and then translates the given words in sequence by making an avatar to display signs of each word. The translation here is corpus based. There is direct mapping between the English and ISL text. Since it is very inefficient to make signs for each word our domain is bounded by certain criteria for which the translator translates the given text. Like, the system which we propose is for railway reservation counters for enquiry