Secure Secret Sharing in the Cloud

Ching-Chun Chang, Chang-Tsun Li

Research output: Book chapter/Published conference paperConference paperpeer-review

1 Citation (Scopus)


Abstract: In this paper, we show how a dealer with limited resources is possible to share the secrets to players via an untrusted cloud server without compromising the privacy of the secrets. This scheme permits a batch of two secret messages to be shared to two players in such a way that the secrets are reconstructable if and only if two of them collaborate. An individual share reveals absolutely no information about the secrets to the player. The secret messages are obfuscated by encryption and thus give no information to the cloud server. Furthermore, the scheme is compatible with the Paillier cryptosystem and other cryptosystems of the same type. In light of the recent developments in privacy-preserving watermarking technology, we further model the proposed scheme as a variant of reversible watermarking in the encrypted domain.
Original languageEnglish
Title of host publication2017 IEEE International Symposium on Multimedia - Proceedings
Place of PublicationUnited States
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9781538629369
ISBN (Print)9781538629383
Publication statusPublished - 01 Jan 2018
Event19th IEEE International Symposium on Multimedia: ISM 2017 - The Splendor Hotel, Taichung, Taiwan, Province of China
Duration: 11 Dec 201713 Dec 2017 (Conference website) (Conference proceedings)


Conference19th IEEE International Symposium on Multimedia
CountryTaiwan, Province of China
OtherThe 19th IEEE International Symposium on Multimedia (ISM2017) is the flagship conference of IEEE Technical Committee on Multimedia (TCMC) and an international forum for researchers to exchange information regarding advances in the state of the art and practice of multimedia computing, as well as to identify the emerging research topics and define the future of multimedia computing.
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