Threshold Password-Hardened Encryption Services

Brost, Julian; Egger, Christoph; Lai, Russell W. F.; Schmid, Fritz; Schröder, Dominique; Zoppelt, Markus

doi:10.1145/3372297.3417266

Cited by 11 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• Signature Generation and Uploading: The physician responsible for the consultation sends an EMR to the patient to confirm the accuracy of the EMR. After receiving the EMR with the user's signature, the physician encrypts the EMR by [118] and signs it to ensure unforgeability based on AQ-ABS. In addition, a combination of IPFS and consortium blockchain is used to achieve secure EMR sharing.…”

Section: Privacy Of Storagementioning

confidence: 99%

Building Resilient Web 3.0 with Quantum Information Technologies and Blockchain: An Ambilateral View

Ren¹,

Xu²,

Niyato³

et al. 2023

Preprint

View full text Add to dashboard Cite

Web 3.0 pursues the establishment of decentralized ecosystems based on blockchain technologies to drive the digital transformation of physical commerce and governance. Through consensus algorithms and smart contracts in blockchain, which are based on cryptography technologies, digital identity, digital asset management, decentralized autonomous organization, and decentralized finance are realized for secure and transparent digital economy services in Web 3.0 for promoting the integration of digital and physical economies. With the rapid realization of quantum devices, Web 3.0 is being developed in parallel with the deployment of quantum cloud computing and quantum Internet. In this regard, quantum computing first disrupts the original cryptographic systems that protect data security while reshaping modern cryptography with the advantages of quantum computing and communication. Therefore, this survey provides a comprehensive overview of blockchain-based Web 3.0 and its quantum and post-quantum enhancement from the ambilateral perspective. On the one hand, some post-quantum migration methods, and anti-quantum signatures offer potential ways to achieve unforgeable security under quantum attack for the internal technologies of blockchain. On the other hand, some quantum/post-quantum encryption and verification algorithms improve the external performance of the blockchain, enabling a decentralized, valuable, secure blockchain system. Finally, we discuss the future directions toward developing a provable secure decentralized digital ecosystem.CCS Concepts: • Security and privacy → Cryptography; • Theory of computation → Models of computation .

show abstract

Section: Privacy Of Storagementioning

confidence: 99%

Building Resilient Web 3.0 with Quantum Information Technologies and Blockchain: An Ambilateral View

Ren¹,

Xu²,

Niyato³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…(We remark that protecting the main application in case of passwords with low entropy is beyond the scope of this work. We refer the reader to [18], [43], [61], and [17] for more details.) Likewise, minor adjustments can be made to extend the technique to rings.…”

Section: B Application Of New Protocolsmentioning

confidence: 99%

Secure Distributed Modular Exponentiation: Systematic Analysis and New Results

Mennink¹

2023

IEEE Trans.Inform.Forensic Secur.

View full text Add to dashboard Cite

Modular exponentiation is a vital function in public key cryptography. Dozens of protocols, including encryption schemes, signature schemes, pseudorandom functions, and more, perform this operation on a secret base and/or a secret exponent. In a multiparty computation setting, these secret data might be shared over multiple parties who wish to compute this modular exponentiation in a secure and distributed way. However, whereas typical frameworks for secure multiparty computation based on secret sharing provide a basic tool box of secure distributed computation of, most importantly, randomness generation, addition, and multiplication, the status quo of secure distributed modular exponentiation is unsatisfactory. In this work, we provide a complete and comprehensive overview on existing protocols for perfectly secure distributed exponentiation differing depending on whether the inputs and outcomes are public or shared. We perform a detailed complexity computation of the currently existing protocols, observing that earlier authors have overestimated the complexity of their own protocols, and close the remaining open problem: protocols for secure distributed exponentiation with secret base, secret exponent, and public outcome. We prove that the presented protocol is universally composably secure in the presence of malicious adversaries. We finally exemplify the practical relevance of the new protocol by demonstrating how it can be used for pseudorandom generation and signing.

show abstract

Parcae: A Blockchain-Based PRF Service for Everyone

Wyss,

Davidson

2022

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

View full text Add to dashboard Cite

Threshold Password-Hardened Encryption Services

Cited by 11 publications

References 6 publications

Building Resilient Web 3.0 with Quantum Information Technologies and Blockchain: An Ambilateral View

Building Resilient Web 3.0 with Quantum Information Technologies and Blockchain: An Ambilateral View

Secure Distributed Modular Exponentiation: Systematic Analysis and New Results

Parcae: A Blockchain-Based PRF Service for Everyone

Contact Info

Product

Resources

About