Topic
Trusted third party
About: Trusted third party is a research topic. Over the lifetime, 2919 publications have been published within this topic receiving 60935 citations.
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TL;DR: A novel blockchain-enabled contextual online learning model under local differential privacy for coronary heart disease diagnosis in mobile edge computing that provides real-time and precious CHD diagnosis for patients with sublinear regret, and achieves efficient privacy protection.
Abstract: Due to the increasing medical data for coronary heart disease (CHD) diagnosis, how to assist doctors to make proper clinical diagnosis has attracted considerable attention. However, it faces many challenges, including personalized diagnosis, high dimensional datasets, clinical privacy concerns and insufficient computing resources. To handle these issues, we propose a novel blockchain-enabled contextual online learning model under local differential privacy for CHD diagnosis in mobile edge computing. Various edge nodes in the network can collaborate with each other to achieve information sharing, which guarantees that CHD diagnosis is suitable and reliable. To support the dynamically increasing dataset, we adopt a top-down tree structure to contain medical records which is partitioned adaptively. Furthermore, we consider patients’ contexts (e.g., lifestyle, medical history records, and physical features) to provide more accurate diagnosis. Besides, to protect the privacy of patients and medical transactions without any trusted third party, we utilize the local differential privacy with randomised response mechanism and ensure blockchain-enabled information-sharing authentication under multi-party computation. Based on the theoretical analysis, we confirm that we provide real-time and precious CHD diagnosis for patients with sublinear regret, and achieve efficient privacy protection. The experimental results validate that our algorithm outperforms other algorithm benchmarks on running time, error rate and diagnosis accuracy.
22 citations
Patent•
15 May 2014TL;DR: In this article, an authentication device may provide an authentication code to a third party device that provides a third-party service to which a client device has requested access, and the authentication device can determine a transaction identifier included in the authentication code.
Abstract: An authentication device may provide an authentication code to a third party device. The third party device may provide a third party service to which a client device has requested access. The authentication device may receive the authentication code from a mobile device that is different from the client device. The authentication device may determine a third party device identifier included in the authentication code. The third party device identifier may identify the third party device that provides the third party service. The authentication device may determine a transaction identifier included in the authentication code. The authentication device may selectively provide the transaction identifier to the third party device, identified by the third party device identifier, to cause the third party device to selectively permit the client device to access the third party service.
22 citations
19 Dec 2005
TL;DR: A secure identity-based encryption scheme to support a fine-grained revocation without key escrow is considered and a mediated key agreement protocol based on the same setting is presented.
Abstract: In identity-based cryptography, a user's public key is easily derived from the user's identity and a corresponding private key is generated for the user by a trusted third party, known as a Key Generation Center (KGC). The direct derivation of public keys in identity-based cryptography can eliminate the need for certificates and can solve certain public key management problems. Identity-based cryptography has many advantages for public key management, but it has two drawbacks that prevent its practical application in the real world: key escrow problems and lack of support for a fine-grained revocation of identity. At present, there is no solution that can simultaneously solve both problems; schemes that can solve the key escrow problem still have the identity revocation problem, and vice versa. In this paper, we consider a secure identity-based encryption scheme to support a fine-grained revocation without key escrow and also present a mediated key agreement protocol based on the same setting. Using the proposed scheme, we can apply identity-based cryptography more securely and practically in the real world.
22 citations
Patent•
13 Oct 2010
TL;DR: In this article, the authors defined a commutative group cipher (CGC) for real-time game among more than two players, where the CGC is secure against ciphertext-only attack (COA) and plaintext attacks (KPA), and is deterministic.
Abstract: An encryption based method of enabling a plurality of parties to share, create, hide, or reveal message or token information over a network includes a commutative group cipher (CGC), where the underlying CGC is secure against ciphertext-only attack (COA) and plaintext attacks (KPA), and is deterministic The protocols doe not require a trusted third party (TTP), and execute rapidly enough on ordinary consumer computers as to be effective for realtime play among more than two players Protocols are defined which include VSM-L-OL, VSM-VL, VSM-VPUM, and VSM-VL-VUM, wherein the letters V, O, SM, P, and UM represent, respectively, Verified, Locking Round, Open, Shuffle-Masking Round, Partial, and Unmasking Round
22 citations
TL;DR: In this paper, the authors present a protocol which allows multiple parties to exchange electronic items over the Internet in a secure and fair way, which allows either each party to get what it expects to receive, or neither party to receive anything.
22 citations