6 citations · 28 across the 23 of their papers we have counts for
20 papers · 1 filter
Attacking and Improving the Tor Directory Protocol
Zhongtang Luo, Adithya Bhat, Kartik Nayak +1
The Tor network enhances clients' privacy by routing traffic through an overlay network of volunteered intermediate relays. Tor employs a distributed protocol among nine hard-coded…
Optimal Sharding for Scalable Blockchains with Deconstructed SMR
Jianting Zhang, Zhongtang Luo, Raghavendra Ramesh +1
Sharding is proposed to enhance blockchain scalability. However, a size-security dilemma where every shard must be large enough to ensure its security constrains the efficacy of in…
Front-running Attack in Sharded Blockchains and Fair Cross-shard Consensus
Jianting Zhang, Wuhui Chen, Sifu Luo +3
Sharding is a prominent technique for scaling blockchains. By dividing the network into smaller components known as shards, a sharded blockchain can process transactions in paralle…
EESMR: Energy Efficient BFT-SMR for the masses
Adithya Bhat, Akhil Bandarupalli, Manish Nagaraj +3
Modern Byzantine Fault-Tolerant State Machine Replication (BFT-SMR) solutions focus on reducing communication complexity, improving throughput, or lowering latency. This work explo…
The Case of FBA as a DEX Processing Model
Tiantian Gong, Zeyu Liu, Aniket Kate
We investigate the welfare loss of continuous and discrete order matching models in blockchain-based decentralized exchanges (DEX) that utilize order books to record outstanding or…
Last Mile of Blockchains: RPC and Node-as-a-service
Zhongtang Luo, Rohan Murukutla, Aniket Kate
While much research focuses on different methods to secure blockchain, information on the chain needs to be accessed by end-users to be useful. This position paper surveys differen…
The Danger of Small Anonymity Sets in Privacy-Preserving Payment Systems
Christiane Kuhn, Aniket Kate, Thorsten Strufe
Unlike suggested during their early years of existence, Bitcoin and similar cryptocurrencies in fact offer significantly less privacy as compared to traditional banking. A myriad o…
More is Merrier: Relax the Non-Collusion Assumption in Multi-Server PIR
Tiantian Gong, Ryan Henry, Alexandros Psomas +1
A long line of research on secure computation has confirmed that anything that can be computed, can be computed securely using a set of non-colluding parties. Indeed, this non-coll…
Empirical Understanding of Deletion Privacy: Experiences, Expectations, and Measures
Mohsen Minaei, Mainack Mondal, Aniket Kate
Social platforms are heavily used by individuals to share their thoughts and personal information. However, due to regret over time about posting inappropriate social content, emba…
Towards Overcoming the Undercutting Problem
Tiantian Gong, Mohsen Minaei, Wenhai Sun +1
Mining processes of Bitcoin and similar cryptocurrencies are currently incentivized with voluntary transaction fees and fixed block rewards which will halve gradually to zero. In t…
Reparo: Publicly Verifiable Layer to Repair Blockchains
Sri Aravinda Krishnan Thyagarajan, Adithya Bhat, Bernardo Magri +2
Although blockchains aim for immutability as their core feature, several instances have exposed the harms with perfect immutability. The permanence of illicit content inserted in B…
Concurrency and Privacy with Payment-Channel Networks
Giulio Malavolta, Pedro Moreno-Sanchez, Aniket Kate +2
Permissionless blockchains protocols such as Bitcoin are inherently limited in transaction throughput and latency. Current efforts to address this key issue focus on off-chain paym…
A Tale of Two Trees: One Writes, and Other Reads. Optimized Oblivious Accesses to Large-Scale Blockchains
Duc V. Le, Lizzy Tengana Hurtado, Adil Ahmad +3
The Bitcoin network has offered a new way of securely performing financial transactions over the insecure network. Nevertheless, this ability comes with the cost of storing a large…
Brief Note: Asynchronous Verifiable Secret Sharing with Optimal Resilience and Linear Amortized Overhead
Aniket Kate, Andrew Miller, Tom Yurek
In this work we present hbAVSS, the Honey Badger of Asynchronous Verifiable Secret Sharing (AVSS) protocols - an AVSS protocol that guarantees linear amortized communication overhe…
Finding Safety in Numbers with Secure Allegation Escrows
Venkat Arun, Aniket Kate, Deepak Garg +2
For fear of retribution, the victim of a crime may be willing to report it only if other victims of the same perpetrator also step forward. Common examples include 1) identifying o…
Forgetting the Forgotten with Letheia, Concealing Content Deletion from Persistent Observers
Mohsen Minaei, Mainack Mondal, Patrick Loiseau +2
Most social platforms offer mechanisms allowing users to delete their posts, and a significant fraction of users exercise this right to be forgotten. However, ironically, users' at…
Settling Payments Fast and Private: Efficient Decentralized Routing for Path-Based Transactions
Stefanie Roos, Pedro Moreno-Sanchez, Aniket Kate +1
Path-based transaction (PBT) networks, which settle payments from one user to another via a path of intermediaries, are a growing area of research. They overcome the scalability an…
Lime: Data Lineage in the Malicious Environment
Michael Backes, Niklas Grimm, Aniket Kate
Intentional or unintentional leakage of confidential data is undoubtedly one of the most severe security threats that organizations face in the digital era. The threat now extends…
Introducing Accountability to Anonymity Networks
Michael Backes, Jeremy Clark, Peter Druschel +2
Many anonymous communication (AC) networks rely on routing traffic through proxy nodes to obfuscate the originator of the traffic. Without an accountability mechanism, exit proxy n…
Adding Query Privacy to Robust DHTs
Michael Backes, Ian Goldberg, Aniket Kate +1
Interest in anonymous communication over distributed hash tables (DHTs) has increased in recent years. However, almost all known solutions solely aim at achieving sender or request…