Recipient Revocable Broadcast Encryption with Dealership

Kim, Joon Sik; Lee, Young Kyung; Eom, Jieun; Lee, Dong Hoon

doi:10.1007/978-3-319-78556-1_12

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2019

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“…Broadcast encryption with dealership accommodates a new business opportunity model and has received lots of attention. 15,16 Broadcast encryption can provide group membership verification; however, the ''dealer'' can trace the contents purchased by the users in the group, which in turn violates the privacy requirements in the aforementioned scenario.…”

Section: Related Workmentioning

confidence: 99%

Efficient oblivious transfer with membership verification

Liu

Sun

Tian

2019

International Journal of Distributed Sensor Networks

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In this article, we introduce a new concept of oblivious transfer with membership verification that allows any legitimate group users to obtain services from a service provider in an oblivious manner. We present two oblivious transfer with membership verification schemes, differing in design. In the first scheme, a trusted group manager issues credentials for a pre-determined group of users so that the group of users with a valid group credential can obtain services from the service provider, while the choices made by group users remain oblivious to the service provider. The second scheme avoids the trusted group manager, which allows any user in the group to be a group manager, thus it is more suitable in distributed systems. In particular, we prove that the two oblivious transfer with membership verification schemes can achieve receiver’s privacy and sender’s privacy under a half-simulation model.

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Section: Related Workmentioning

confidence: 99%