A New Security Level Oriented Multisignature Scheme
Abulameer Khalaf Hussain1, Muthnna Abdulwahid Khudhair2

1Dr. Abdulameer K. Husain, PhD in Computer Science, Computer Security, Presently Working as Assistant. Prof., in Computer Department in Dijlah College University–Iraq-Bagdad.
2Muthnna Abdulwahid Khudhair, MSc. In Computer Science Presently Working as Assistant. Prof., in Computer Depament in Dijlah College University–Iraq-Bagdad

Manuscript received on November 25, 2017. | Revised Manuscript received on November 28, 2017. | Manuscript published on January 30, 2017. | PP: 6-9 | Volume-6 Issue-6, January 2017. | Retrieval Number: F2936016617/2017©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This paper presents a new multisignature scheme. The idea behind this scheme is that all authenticated users in the system are classified according to their security levels . Each level has its own trusted group manager. To generate the signature, the proposed system selects one of these levels .Each level consists of a group of users . Each user has its own private and public keys. In addition, this scheme implements the cascade encryption for the generated signature, and thus it is necessary to perform the cascade encryption to use a global private key for each level. The system also assigns trustworthiness score for each user to select the proper one to sign on the behalf of his/her group in that level. Finally, the generated multisignure is proved to be more secure and thus it can be used in sensitive applications.
Keywords: Digital Signature, multisignature system, Security Levels, Multi-level proxy signature.