Aniket Kate
@aniketpkate
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Enjoys solving people-centric security/privacy problems. Topics: Applied Crypto, Distributed Systems, Blockchains, & Network Privacy
Research@Supra, Prof@Purdue
Joined November 2009
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Some thinking on (blockchain) Oracles:
#BlockchainOracles
primarily offer data (such as exchange rates) from the outside world (Web2) to blockchain smart contracts (Web3). [1/n]
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got promoted to be an Associate Prof. Truly an important milestone in my career.
Thanks to my family, students, advisor (Ian Goldberg), co-authors, colleagues
@PurdueCS
, and many supporters in the infosec community.
Congratulations to
@LifeAtPurdue
Professor Aniket Kate (
@aniketpkate
) on his promotion to associate professor by the
#PurdueUniversity
Board of Trustees.
The Persistent Pursuit of
#TheNextGiantLeap
.
Details: .
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We are presenting four papers on distributed computing/MPC in the next two weeks.
Busy weeks with all presentation preparations... [1/5]
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Yeah! Another grant!
Congratulations✨
@aniketpkate
✨ 2019 NSF CAREER Award for "Towards Privacy and Availability of Inter-blockchain Communication"
Story:
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Improved version of Moonshot paper:
(appearing at
#DSN
'24)
@SUPRA_Labs
is already using it for its blockchain. You should as well.
Much improved performance over
#Jolteon
&
#Tendermint
by
@IsaacDoidge
@nibeshrestha2
@80Raghavendra
&
@JoshuaTobkin
Introducing
#Moonshot
(a performance-focused) chained, rotating leader SMR with optimistic proposals
()
by
@IsaacDoidge
@nibeshrestha2
@80Raghavendra
&
@JoshuaTobkin
from
@SupraOracles
research [1/4]
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Our paper 'More is Merrier: Relax the Non-Collusion Assumption in Multi-Server PIR' () led by
@esnie17
got accepted to IEEE S&P 2024 recently.
(w/ Ryan Hnery, n Alex Psomas) The journey of this paper has been long and is indeed worth sharing. [1/n]
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Byzantine/malicious failures are rare in distributed environments; however, as a result, I find many inaccurate models have emerged especially for multi-service organizations and it is worth (re-)thinking about security here. [1/4]
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While distributed computing & applied crypto researchers are making waves in the thriving blockchain industry, the CS academia (the US and a few other countries) still doesn't particularly look for candidates who claim blockchain as their area of research.
What can we do?
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the undercutting attacks on Bitcoin are not profitable as previous thought (check )
w/ Tiantian Gong,
@mminaeib
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Two papers are getting presented at ACM CCS this week. presenters:
@Easwar_Vivek
and
@pratyay85
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Even the best possible (in the practical sense) application-level anonymity using ZK proofs cannot overcome network-level issues. We need network-level anonymity in tandem.
If your privacy model has a medium anonymity set, it really has a small anonymity set. If your privacy model has a small anonymity set, it has an anonymity set of 1. Only global anonymity sets (eg. as done with ZK-SNARKs) are truly robustly secure.
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New
#Frontrunning
attack when blockchains are
#sharded
()
@EtherCS
will be presenting the attack and solutions
@NDSSSymposium
soon
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Hey
@decredproject
just saw that you used employed Dicemix/coinshuffle++. Always happy to hear when our tech gets used. You should also read our latest work on scaling Dicemix.
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A reviewer recently (incorrectly) suggested that we forgot to discuss and compare one of my own papers.
One more life achievement accomplished! 😒
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I have changed 'blacklist' n 'whitelist' to 'unsafe-list' n 'safe-list' in my computer security course material. Have you?
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[New Paper Alert] A Homerun for oblivious message retrieval (OMR) () w/ Yanxue Xia () n
@Varun_2703
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Excited to announce Workshop on Real-World Decentralized Cryptography () aff. w/
#realworldcrypto
(co-organized with
@web3foundation
)
We have passed 500 registrations for
#realworldcrypto
2021. Don't forget to check out the growing list of affiliated events: (some require advance registration).
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Congratulations to Dr
@Easwar_Vivek
on a successful Ph.D. defense. Title: Realizing Information Escrows and Efficient Key Management using Threshold Cryptography
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Introducing Reparo ()
a publicly verifiable layer on top of any blockchain to perform repairs, ranging from fixing buggy contracts to removing illicit contents
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“The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.” ~Isaac Asimov
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Introducing
#Moonshot
(a performance-focused) chained, rotating leader SMR with optimistic proposals
()
by
@IsaacDoidge
@nibeshrestha2
@80Raghavendra
&
@JoshuaTobkin
from
@SupraOracles
research [1/4]
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An observation about the constant-size polynomial commitments [Asiacrypt'10] (aka KZG) that is relevant for threshold crypto at least: a committer/dealer can precompute commitment C (except 1 exponentiation & 1 multiplication) and all witnesses without knowing the secret s [1/n]
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Class groups (i.e., ideal class groups of imaginary quadratic fields) have found a few interesting applications in threshold crypto, MPC, & fairness.
While it is a problem with a long history, we still do not want good implementation. And, we need them. [1/2]
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My talk () on building MPC or privacy-preserving computation securely over blockchain from
@d_InfraSummit
#ETHDenver2024
Thanks to
@d_InfraSummit
for great organization and content generation.
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While that happens, the faculty candidate in the blockchain area should be ready to demonstrate that
"Even if blockchain disappears tomorrow (not going to happen), your research in distributed computing, cryptography, & game theory is still valuable to computing in general."
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Congratulation to Dr.
@tutaidas
on successful Ph.D. defense. Awesome work towards lower-bounding and upper-bounding anonymous communication protocols
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A newer much-improved analysis of the undercutting problem:
the undercutting attacks on Bitcoin are not profitable as previous thought (check )
w/ Tiantian Gong,
@mminaeib
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I ran my computer security (cs426) undergrad course completely online this semester. It was a mixture of synchronous/asynchronous teaching. Here, is what I learned. [1/n]
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Congrats to Dr. Duc V. Le
@levduc
on the successful completion of his thesis work w/ Mike Atallah and me
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I am actively looking for one or more PostDoc fellow to work on the related problems. Email me if interested.
Congratulations✨
@aniketpkate
✨ 2019 NSF CAREER Award for "Towards Privacy and Availability of Inter-blockchain Communication"
Story:
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Formally verified blockchain consensus!
@80Raghavendra
will be presenting formal verification of
@Supra
#Moonshot
at Workshop on Formal Methods for Blockchains ()
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congrats to
@_hermitsage_
on completing his doctoral thesis 'Pipelined Byzantine Fault Tolerance and Applications'
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View from my Hotel while attending NDSS. Real sea, not some lagoon. :)
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graduated two students in two days. a bit overwhelming
Congrats to Dr. Duc V. Le
@levduc
on the successful completion of his thesis work w/ Mike Atallah and me
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Our work (Concurrency & Privacy with Payment-Channel Networks) in the ACM CCS highlights
@pedrorechez
@matteo_maffei
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Extremely proud of Tim's achievements during his Ph.D. I am sure he will continue his journey of academic excellence + real-world impact in the future
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@buywinrar
@SUPRA_Labs
For randomness: The underlying distributed VRF ensures that an observer (without knowing the VRF secret key) cannot distinguish dVRF output from randoms.
Unlike VRF services, for Supra dVRF, no single party knows the secret key; thus, the output is unbiased & unpredictable.
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Congratulations to Mohsen for successfully defending his PhD thesis. Special recognition for his perseverance while working on the challenging problem of deletion privacy. Cheers!!
#ProudAdvisor
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great to hear
@helium
() &
@poanetwork
() are building (dealer-less) distributed key generation (DKG) based on my thesis work
Code works & I am happy to clarify doubts. Just avoid the Synchrony Assumption!
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A high-speed (network) anonymity solution for well-defined groups with 100s of people
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(Online) Workshop on Blockchains + Trusted Execution Environments () on coming Monday & Tuesday (April 3rd and 4th). Check out an awesome program at
w/
@kartik1507
@ittaia
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Had a great time today interacting with several distributed systems and crypto researchers at cs.berkeley
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Using class groups for efficient publicly verifiable VSS/DKG w/
@Easwar_Vivek
@pratyay_algo
Hamza Saleem &
@aravind16coiner
#ePrint
Non-interactive VSS using Class Groups and Application to DKG: A Kate, EV Mangipudi, P Mukherjee, H Saleem, SAK Thyagarajan
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@Easwar_Vivek
4. [ICDCS 2023] In two weeks,
@sbjoshi
will present DORA ().
DORA is an async (decentralized) blockchain oracle tolerating up to 50% Byzantine oracle nodes! The protocol is simple in the SMR-based model and is already in production at
@SupraOracles
[5/5]
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Program for the Workshop on Decentralized Credit Networks (DCN) is ready.
looking forward to welcoming and listening to exciting speakers from the industry and academia.
Co-organized w/
@socrates1024
Announcing "Decentralized Credit Networks" a new workshop October 26th at AFT in New Jersey this year:
Co-organized with Aniket Kate
@aniketpkate
See our call for contributed talks
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"An idea which can be used only once is a trick. If you can use it more than once it becomes a method." ---G. Polya and G. Szego
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One of the key thing I miss during this pandemic is visiting my students/lab, especially after a brutal rejection. I find that to be a very good way to stop thinking about it
and recharge.
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had so much difficulty in publishing my verifiable secret sharing, threshold crypto papers at top venues that I gave it up after my post-doc days. It is becoming hot now in the blockchain context, and prominent groups are writing papers on those. It's time to revisit my old notes
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Looking forward to the exciting next three days in Denver
#ETHDenver
. I will speak at the following events and hope to meet and interact with blockchain researchers and developers...
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Our work Reparo: Publicly Verifiable Layer to Repair Blockchains () will be appearing at FC 2021 soon. This work has an interesting story. [1/5]
An illustrative blog post on Reparo — Band-aid for blockchains
by
@_hermitsage_
w/
@aravind2112
@bemagri
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a new scaling technique for many anonymity networks (Divide and Funnel: )
(w/
@tutaidas
@SebastianMeiser
n Esfandiar Mohammadi)
2
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at time feel a bit envy of blockchain academics with US/EU passports, who can just pack their bags and go anywhere to talk about their work. I had to say 'No' for a few invitations this year as I just can't find those 2-3 spares days required to get on those visas
#cryptotourism
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Looking forward to attending my first AFT, also my first post Covic academic conference
ACM advances in financial technologies 22 is on!
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Can I learn how to speak like Pete Buttigieg? I can get many more of my papers accepted.
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Our work "Flexible Signatures" is accepted to appear at ESORICS'19
#esorics19
w/ Duc V. Le
We ask why the cryptographic primitives can't have confidence level similar ML.
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1. [Euro S&P 2023] Albert Yu presented SIM () an efficient MPC for Secure Comparison operation.
We reduce the online computation to a simple table lookup by making Ishai et al [TCC'13] practical. [2/5]
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As lightning & other networks use Sphinx for anonymity, my FC'10 work can be of interest
2
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Jeremiah Blocki, Christina Garman
@CryptoGPS
, Hemanta K. Maji and I are looking for postdocs/visitors working on applied cryptography, MPC, or/and secure distributed systems at
@PurdueCS
. Check out our posting at
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Rethinking the execution order for blockchain blocks:
(now with detailed analysis and findings)
#MEV
#Crypto
#DeFi
No need to execute blockchains transactions in order () In an early draft
@esnie17
offers a market design towards mitigating general order manipulations. Comments/suggestions?
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Call: IEEE Computer Security Foundations (CSF) has a blockchain track ()
If you couldn't manage to get somebody ready for CCS, CSF can be interested in those submissions. Check out the call.
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Beyond grants that only help established faculty members, the blockchain industry should start creating endowed positions in the universities. Once there is money, the universities will happily hire people to train the next generation of blockchain developers.
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When I talk to people trying to build blockchain-based distributed solution, I find a general lack understanding of privacy implications with an open ledger.
#blockchain
#privacymatters
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Looking forward to be in Denver at the end of Feb
#ETHDenver2024
Please reach out to connect
💫 We're thrilled to announce
@aniketpkate
,
@PurdueCS
Professor and
@SupraOracles
Chief Research Officer, joins us to discuss building threshold cryptosystems & MPC applications.
Event Details here:
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Tokens like
#XRP
are not necessary for IOU credit networks. We will continue to work towards demonstrating that at However, I do remember Keynes: "The market can remain irrational longer than you can remain solvent."
5
2
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paper accepted to
#www2018
@TheWebConf
: much improved version of our Ripple user security analysis work
(w/
@pedrorechez
, Navin Modi,
@raghson
& Sonia Fahmy
@PurdueCS
)
3
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Friday afternoon thought: sitting with a pile of rejected papers.
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2. [PETS 2023] Next week, Donghang Lu will present RPM (). He observed that anonymous broadcast can be much simple by generating a random permutation matrix in an MPC fashion.
Check out how we make it scale for >100K using Hastad's square networks. [3/5]
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3. [CSF 2023] Again, next week,
@Easwar_Vivek
will present collusion-deterrent escrow (). In gist, combining oblivious transfer, robust bit watermarking, & MPC, we ensure that rational agents will collude to decrypt the escrowed data prematurely. [4/5]
2
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Looking forward to attending #
#realworldcrypto
'24 in Toronto next week. Excited to meet many old/new faces.
1
1
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Looking forward to presenting our insights at Supra tomorrow w/
@JoshuaTobkin
@sbjoshi
@Pratyay_algo
⚡ Want to get some of the industry's best insider alpha-- and learn about the shifts that could revolutionize blockchain forever? 📈🔥
Our exclusive webinar starts in just 2 days 😎
Sign up now: ⬇️
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Congratulation to Dr. Donghang Lu on his successful Ph.D> defense. Title: Efficient Building Blocks for Secure MPC and Their Applications
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First time my complete current group is together. With
@real_or_random
,
@pedrorechez
,
@tutaidas
,
@MMianei
and a few others
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@petertoddbtc
Asynchronous payment channels for decentralized, loosely synchronized points of sale, and more things.
1
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The success of
#Chandrayaan3
especially in the context of Chandrayaan2 should be motivating to each of us. Cheers to perseverance and team efforts!
Chandrayaan-3 Mission:
'India🇮🇳,
I reached my destination
and you too!'
: Chandrayaan-3
Chandrayaan-3 has successfully
soft-landed on the moon 🌖!.
Congratulations, India🇮🇳!
#Chandrayaan_3
#Ch3
71K
287K
859K
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Towards a Tokenless IOU Credit Network Realization in Ethereum
Comments/suggestions most welcome (check out details)
#ETHEREUM
#Ripple
#IOU
w/
@pedrorechez
, Adithya Bhat
2
5
15
chairing a blockchain track for
@CSFSymposium
2019. Look forward to read your foundational results and provably secure protocols on
#blockchains
and
#cryptocurrencies
0
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upcoming
@NDSSSymposium
paper: Decentralized Routing for Path-Based (Off-chain / Credit Network / AtomicSwaps / Interledger) Transactions
w/ Stef Roos,
@pedrorechez
& Ian Goldberg:
0
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@acm_ccs
will be the fourth conference this summer that I had work present but cannot attend due to visa challenges. :( [1/n]
4
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#web3wallet
needs more attention. This SoK should lead many improved solutions in the near future.
Lost your blockchain credentials? 😟
Explore the most recent SoK on recovery methods & open challenges, thanks to the combined efforts of
@Visa
,
@SupraOracles
,
@Mysten_Labs
,
@LifeAtPurdue
,
@IITKgp
➡️
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"Efficient Non-Interactive Zero-Knowledge Proofs in Cross-Domains without Trusted Setup" (offering a different trade-off between the proof size and the running time) by Ivan Pryvalov and other of us
#PKC2019
0
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Moonshot () itself will be appearing at DSN 2024. More about it soon
1
2
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Video recordings for the Real-world Decentralized Crytpgraphy Workshop are available
Excited to announce Workshop on Real-World Decentralized Cryptography () aff. w/
#realworldcrypto
(co-organized with
@web3foundation
)
2
15
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1
5
13
Looking forward to Attend FC after 9 years. Anybody for dinner tonight after 7pm
1
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Censorship Resistant using Cryptocurrencies such as
@zcashco
@monerocurrency
@bitcoincoreorg
@ethereum
as well as mining in general Comments Welcome. w/
@MMianei
@pedrorechez
#blockchain
#cryptocurrencynews
#censorship
0
5
13
Analyzing Semantic Correctness of PKCS
#1
v1.5 Signature Verification ()
Awesome
@NDSSSymposium
2019 work by my (co-advised) student Sze Yiu Chau (w/ generous help from
@ochowdhu
)
1
5
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