Proposal for an authentic and profitable system for secret sharing of data

摘要

Secret sharing of data has certainly not been a trouble-free task with improvements in cloud computing, and a precise consideration on data that is shared offers several advantages to general public as well as individuals. There are a variety of issues that are faced when data is shared with many participants. An assuring applicant that could be used to build a secure and dependable data sharing system is ring signature. Nevertheless, the main disadvantage of ring signature is expensive verification of certificate in typical PKI. Therefore, ID-based ring signature can be used because it removes certificate verification process. This study aims to advance ID-based ring signature. In other words, if a user's secret key has been conceded, then all heretofore created signs comprising the user continue to be effective. This characteristic is mainly significant to a sharing system that has large-scale data because it is practically not possible to request possessors of data to reconfirm their data although a single users' secret key has been conceded. In this study, we propose an authentic and profitable system, known as ID-based block ring signature system, for secret sharing of data.