Sequential Secret Sharing Scheme Based on Level Ordered Access Structure

In Software Industry an application can be released to production only after it has gone through Unit testing, followed by Integration testing, then System testing and finally Acceptance testing. Note here that without the completion of unit testing, integration testing cannot be started and similarly without the completion of integration testing, system testing cannot be started and so on. That is the ordering is important. To realize this or similar kind of activity we need a hierarchial access structure that has in built ordering among the levels. Existing access structures fail to realize this scenario as they are short of enforcing the required ordering. The purpose of this paper is to propose an access structure that caters to this kind of scenarios and come up with schemes that realize this access structure. We call this new access structure as Level Ordered Access Structure(LOAS) and the schemes that realize this access structure as Level Ordered Secret Sharing(LOSS) schemes.