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Tagged: research
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Library
A Hybrid Approach to the Problems of Time-Stamping
UPB Scientific Bulletin paper surveying simple, linking, and distributed time-stamping schemes, their back-dating and verification weaknesses, and a hybrid multi-authority design using control time-stamps.
An Introduction to Merkle Patricia Trie
LambdaClass blog primer on the Merkle Patricia Trie (MPT), the authenticated key-value structure behind Ethereum state: tries, Patricia path compression, Keccak hashing, node types, StateRoot, and proof construction.
Angela: A Sparse, Distributed, and Highly Concurrent Merkle Tree
UC Berkeley CS262a project report on Angela, a sparse distributed Merkle tree with fine-grained conflict-node locking for concurrent batched updates, built on Ray and Amazon Aurora, achieving 2x over Trillian.
Blockchain-based Infrastructure for Proof of Existence in eGovernment
Vizzarri (2020) CEUR paper proposing a Bitcoin blockchain proof-of-existence scheme for eGovernment documents using OP_RETURN hash records, contrasted with centralized, decentralized, and distributed trusted-third-party systems.
Cryptographic Accelerators for Digital Signature Based on Ed25519
IEEE TVLSI 2021 paper by Bisheh-Niasar, Azarderakhsh, and Mozaffari-Kermani presenting two FPGA hardware accelerators for the Ed25519 (EdDSA) digital signature, with Karatsuba multiplication and side-channel countermeasures.
Design of a Secure Timestamping Service with Minimal Trust Requirement
1999 UCL Crypto Group paper (Massias, Serret Avila, Quisquater) on the Belgian TIMESEC timestamping service: round-based Merkle trees, hash-linked round values, and newspaper publication to minimize trust in the authority.
How to Time-Stamp a Digital Document
Haber and Stornetta's 1991 Journal of Cryptology paper founding cryptographic digital timestamping via hashing, digital signatures, hash-linking chains, and distributed-trust witnessing.
Improving the Efficiency and Reliability of Digital Time-Stamping
Bayer, Haber, and Stornetta 1993 paper introducing hash trees (Merkle trees) to batch digital time-stamp requests, reducing storage and verification cost and enabling time-stamp renewal to extend signature lifetimes.
The Provable Security of Ed25519: Theory and Practice
Academic paper giving the first detailed security proofs for Ed25519 (EdDSA) signature variants, covering EUF-CMA, SUF-CMA, key substitution resistance, malleability, and small-subgroup element checks.
Towards More Reliable Bitcoin Timestamps (arXiv)
Short paper by Szalachowski (2018) showing Bitcoin block timestamps are miner-manipulable, and proposing external trusted timestamping authorities and SSL/TLS reference times to bound a block to a provable time window.
Tsunami of Blockchain Technology and Patents: A Strategic Data-Analytic Overview
ABA Jurimetrics (Fall 2023) data-analytic survey of global blockchain patent filing trends, the post-Bitcoin surge and crypto-winter cooling, US and IBM leadership, and Section 101 patent-eligibility strategy.
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