Optimistic protocol for certified electronic mail with verifiable TTP

Ferrer-Gomila, Josep-Lluís; Hinarejos, M. Francisca; Draper-Gil, Gerard; Huguet-Rotger, Llorenç

doi:10.1016/j.csi.2017.11.001

Cited by 7 publications

(1 citation statement)

References 16 publications

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“…The blocks include information about their creation date, allowing it to track transaction information, such as messages with a stamp included. Through timestamp systems, the authority has a central role in determining the information that can be given and its traceability throughout the process, preventing the immutability of information on the network and keeping it accurate [74]. Implementing blockchain technology makes it possible to fulfill security requirements through disintermediation.…”

Section: Digital Marketingmentioning

confidence: 99%

Stick or Twist—The Rise of Blockchain Applications in Marketing Management

et al. 2022

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The adoption of blockchain technology by companies can change the way they interact with stakeholders, redefining communication strategies and other marketing processes. In this study, we investigated the relevance of blockchain applications for marketing management from the perspective of marketing-related professionals. Answers about blockchain technology application in the marketing arena were collected from the social platform Quora. The data were analyzed through text mining and Spearman’s correlation coefficient to assess the degree of association, inherent intensity, and the association significance between the variables payments, supply chain, loyalty programs, digital marketing, credential management, and marketing management, using Quora-specific metrics, namely, upvotes, shares, and views. The results posit blockchain technology as being an asset for marketing, with greater relevance in supply chain and internal management among marketing operations. Professionals will be able to potentially improve internal management systems and marketing campaigns, which will enhance companies’ competitive advantage.

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Section: Digital Marketingmentioning

confidence: 99%

Stick or Twist—The Rise of Blockchain Applications in Marketing Management

et al. 2022

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Choosing Fitting Technology

Paulin¹

2019

Smart City Governance

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A Publicly Verifiable Optimistic Fair Exchange Protocol Using Decentralized CP-ABE

Zhang

Kan

Qiu

et al. 2023

The Computer Journal

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Fair exchange is a challenging problem for two mutually distrusting players. It is widely known that fair exchange is impossible without a trusted third party (TTP). However, relying on a single TTP can cause a single-point failure. An intuitive idea is to adopt multiple TTPs to distribute trust. This paper constructs a two-party optimistic fair exchange (OFE) protocol using decentralized ciphertext-policy attribute-based encryption (CP-ABE), achieving decentralized TTPs. This is achievable because decentralized CP-ABE ciphertext supports a nested access control policy. A nested access control policy fits perfectly in a fair exchange protocol which contains multiple roles (i.e. players and TTPs). Further, we apply non-interactive zero knowledge proofs to prove the well-formedness of ciphertexts, so as to enforce players to follow the protocol specification honestly. Consequently, we construct an OFE protocol in which each player’s operations are publicly verifiable without revealing secret information. Also, we obtain decentralized TTPs with optimism (i.e. the TTPs are involved only when arbitration is required), autonomy (i.e. the TTPs do not need to interact with each other), statelessness (i.e. the TTPs do not need to store data for the exchange protocol) and verifiability (i.e. the TTPs are publicly verifiable). Compared with previous work, our protocol assumes only a public communication channel and each party’s operations are publicly verifiable. Besides, it achieves a favorable $O(n)$ verification complexity in the normal case, where $n$ is the number of TTPs. Finally, we present a proof-of-concept implementation to demonstrate the feasibility.

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Optimistic protocol for certified electronic mail with verifiable TTP

Cited by 7 publications

References 16 publications

Stick or Twist—The Rise of Blockchain Applications in Marketing Management

Stick or Twist—The Rise of Blockchain Applications in Marketing Management

Choosing Fitting Technology

A Publicly Verifiable Optimistic Fair Exchange Protocol Using Decentralized CP-ABE

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