| Popis: |
The idea raises a novel data security protocol for ensuring reliable online affirmation of e-documents with stronger compliance of authentication, integrity confidentiality, and non-repudiation scenarios. Initially the parent authority shares four secret signatures to the authorized client and stores them on server database. The protocol is initiated by server with hiding of four parent body signatures on the e-document image with each one hosted on a separate region. Critically, this hiding is dictated by self-derived hash functions on client id-number for precisely locating the concern region hosting the particular applicable signature. Importantly, this idea is implemented through hash values tracing the start indexes for circular sequencing of regions as well as signatures both. Next, this certified e-document is endorsed at the client end with segmented concealment of each shared signature on each separate region. Interestingly, here also similar region based circular sequencing of signatures are adopted with self-designed hash operations on client name, client date-of-birth and server issued session random challenge. Finally, this authenticated e-document is ratified by server with validation of all embedded signatures through those same hash functions to establish data authenticity cum legality of both parties. Additional enhancement is also addressed by fabricating signature bits on distinctly transformed pixel byte elements of an image block and adopting standard deviation based block transformations to promote excellent robustness. Overall, this protocol clearly confirms superiority over other works both in terms of security principals and standardized evaluation of exhaustive simulation results from different angles. |
