Dynamical Digital Authentication for Wireless Domain With Randomized Dispersing of Multiple Secret Signatures

Abstract

The work promotes reliable dynamical validations for transmitted e-documents using session wise randomly hidden secret multi-signatures. Client triggers this protocol by deriving the random circular sequencing of such invisible signatures onto the cover image e-document. Additional security and authenticity criteria met with dynamical orientations of hidden signature bits on concern sub block pixel bytes of the cover image. Vitally both these dynamical fabrications are fully governed by the respective mathematical operations executed on client-server based mutual secret key and session random challenge. Hence, same dynamical authentications for those valid copyright signatures can also be complied at the server end. Apart from that multi-copy signature dispersing with hosting of each individual signature copy on each separate regions of the cover image serves better authenticity and robustness under attacks. Further region wise varied transforms on sub image blocks with variable threshold range driven sign bit encoding on separate transformed pixel bytes of such sub blocks ensures excellent robustness and recovery of signatures. Finally, exhaustive experimental results also confirmed strong superiority of this scheme over existing works with significant enhancements on standard evaluation parameters. Overall, this protocol reflects better trusted authentication, confidentiality and non-repudiation for wireless digital transmissions in contrast to the current ideas.