I need to find a secret sharing scheme with these properties:
The scheme is set up by all participants, ie no single entity called the dealer
The parameters of secret sharing need to be modifiable,eg enrollment, disenrollment, change of access structure, ...
Need to be verifiable, ie participants could check whether their shares are consistant with others.
Is this scheme could be available at all !?
I'll appreciate any help to find that.
Thanks in advance.