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ORCIDKostas Kryptos Chalkias
Konstantinos Kryptos Chalkias – Konstantinos Chalkias
Person information
- affiliation: Mysten Labs, Palo Alto, CA, USA
- affiliation (former): Facebook Inc., Menlo Park, CA, USA
- affiliation (2017 - 2019): R3, London, UK
- affiliation (2014 - 2016): Erybo, San Francisco, CA, USA
- affiliation (2011 - 2014): Safemarket, Athens, Greece
- affiliation (former): University of Macedonia, Thessaloniki, Greece
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2020 – today
- 2025
[c36]Kostas Kryptos Chalkias, Deepak Maram, Arnab Roy, Joy Wang, Aayush Yadav:
Zero-Knowledge Authenticator for Blockchain: Policy-Private and Obliviously Updateable. AFT 2025: 2:1-2:23- [c35]John Naulty, Eason Chen, Joy Wang, George Digkas, Kostas Kryptos Chalkias:
Bugdar: AI-Augmented Secure Code Review for GitHub Pull Requests. CAI 2025: 613-616 - [c34]Eason Chen
, Xinyi Tang, Zimo Xiao, Chuangji Li, Shizhuo Li, Tingguan Wu, Siyun Wang, Kostas Kryptos Chalkias:
SuiGPT MAD: Move AI Decompiler to Improve Transparency and Auditability on Non-Open-Source Blockchain Smart Contract. WWW 2025: 1567-1576 - [i35]John Naulty, Eason Chen, Joy Wang, George Digkas, Kostas Kryptos Chalkias:
Bugdar: AI-Augmented Secure Code Review for GitHub Pull Requests. CoRR abs/2503.17302 (2025) - [i34]Kostas Kryptos Chalkias, Deepak Maram, Arnab Roy, Joy Wang, Aayush Yadav:
Zero-knowledge Authenticator for Blockchain: Policy-private and Obliviously Updateable. IACR Cryptol. ePrint Arch. 2025: 921 (2025) - [i33]Foteini Baldimtsi, Konstantinos Chalkias, Arnab Roy:
Post-Quantum Readiness in EdDSA Chains. IACR Cryptol. ePrint Arch. 2025: 1368 (2025) - [i32]Easwar Vivek Mangipudi, Panagiotis Chatzigiannis, Konstantinos Chalkias, Aniket Kate, Mohsen Minaei, Mainack Mondal:
Web3 Recovery Mechanisms and User Preferences. IACR Cryptol. ePrint Arch. 2025: 1687 (2025) - 2024
- [c33]Miranda Christ, Foteini Baldimtsi, Konstantinos Kryptos Chalkias, Deepak Maram, Arnab Roy, Joy Wang:
SoK: Zero-Knowledge Range Proofs. AFT 2024: 14:1-14:25 - [c32]Foteini Baldimtsi, Konstantinos Kryptos Chalkias, Yan Ji, Jonas Lindstrøm, Deepak Maram, Ben Riva, Arnab Roy, Mahdi Sedaghat, Joy Wang:
zkLogin: Privacy-Preserving Blockchain Authentication with Existing Credentials. CCS 2024: 3182-3196 - [c31]Foteini Baldimtsi, Konstantinos Chalkias, Panagiotis Chatzigiannis, Mahimna Kelkar:
Truncator: Time-Space Tradeoff of Cryptographic Primitives. FC (2) 2024: 101-118 - [c30]Foteini Baldimtsi, Konstantinos Kryptos Chalkias, François Garillot, Jonas Lindstrøm, Ben Riva, Arnab Roy, Mahdi Sedaghat, Alberto Sonnino, Pun Waiwitlikhit, Joy Wang:
Subset-Optimized BLS Multi-signature with Key Aggregation. FC (2) 2024: 188-205 - [c29]Kostas Kryptos Chalkias, Jonas Lindstrøm, Deepak Maram, Ben Riva, Arnab Roy, Alberto Sonnino, Joy Wang:
Fastcrypto: Pioneering Cryptography Via Continuous Benchmarking. ICPE (Companion) 2024: 227-234 - [i31]Foteini Baldimtsi, Konstantinos Kryptos Chalkias, Yan Ji, Jonas Lindstrøm, Deepak Maram, Ben Riva, Arnab Roy, Mahdi Sedaghat, Joy Wang:
zkLogin: Privacy-Preserving Blockchain Authentication with Existing Credentials. CoRR abs/2401.11735 (2024) - [i30]Eason Chen, Zimo Xiao, Justa Liang, Damien Chen, Pierce Hung, Kostas Kryptos Chalkias:
Buck You: Designing Easy-to-Onboard Blockchain Applications with Zero-Knowledge Login and Sponsored Transactions on Sui. CoRR abs/2404.03845 (2024) - [i29]Kostas Kryptos Chalkias, Angelos Kostis, Ali Alnuaimi, Peter Knez, John Naulty, Allen Salmasi, Ryan Servatius, Rodrigo Veloso:
Preserving Nature's Ledger: Blockchains in Biodiversity Conservation. CoRR abs/2404.12086 (2024) - [i28]Eason Chen, Xinyi Tang, Zimo Xiao, Chuangji Li, Shizhuo Li, Tingguan Wu, Siyun Wang, Kostas Kryptos Chalkias:
MAD: Move AI Decompiler to Improve Transparency and Auditability on Non-Open-Source Blockchain Smart Contract. CoRR abs/2410.15275 (2024) - [i27]Konstantinos Kryptos Chalkias, Jonas Lindstrøm, Arnab Roy:
An Efficient Hash Function for Imaginary Class Groups. IACR Cryptol. ePrint Arch. 2024: 295 (2024) - [i26]Miranda Christ, Foteini Baldimtsi, Konstantinos Kryptos Chalkias, Deepak Maram, Arnab Roy, Joy Wang:
SoK: Zero-Knowledge Range Proofs. IACR Cryptol. ePrint Arch. 2024: 430 (2024) - [i25]Konstantinos Kryptos Chalkias, Jonas Lindstrøm, Deepak Maram, Ben Riva, Arnab Roy, Alberto Sonnino, Joy Wang:
Fastcrypto: Pioneering Cryptography Via Continuous Benchmarking. IACR Cryptol. ePrint Arch. 2024: 442 (2024) - [i24]Jonas Lindstrøm, Kostas Kryptos Chalkias:
Optimized Computation of the Jacobi Symbol. IACR Cryptol. ePrint Arch. 2024: 1054 (2024) - [i23]Kostas Kryptos Chalkias, Charanjit S. Jutla, Jonas Lindstrøm, Varun Madathil, Arnab Roy:
Improved Polynomial Division in Cryptography. IACR Cryptol. ePrint Arch. 2024: 1279 (2024) - [i22]Foteini Baldimtsi, Kostas Kryptos Chalkias, Varun Madathil, Arnab Roy:
SoK: Privacy-Preserving Transactions in Blockchains. IACR Cryptol. ePrint Arch. 2024: 1959 (2024) - 2023
- [c28]Donald Beaver, Konstantinos Chalkias, Mahimna Kelkar, Lefteris Kokoris-Kogias, Kevin Lewi, Ladi de Naurois, Valeria Nikolaenko, Arnab Roy, Alberto Sonnino:
STROBE: Streaming Threshold Random Beacons. AFT 2023: 7:1-7:16 - [c27]Sam Grierson, Konstantinos Chalkias, William J. Buchanan, Leandros Maglaras:
Double Public Key Signing Function Oracle Attack on EdDSA Software Implementations. CAMAD 2023: 194-199 - [i21]Sam Grierson, Konstantinos Chalkias, William J. Buchanan:
Double Public Key Signing Function Oracle Attack on EdDSA Software Implementations. CoRR abs/2308.15009 (2023) - [i20]Eason Chen, Justa Liang, Ray Huang, Pierce Hung, Damien Chen, Ashley Hsu, Konstantinos Chalkias, Stefanos Pleros:
Building Random, Fair, and Verifiable Games on Blockchain. Raffle smart contract designs on Sui Network. CoRR abs/2310.12305 (2023) - [i19]Foteini Baldimtsi, Konstantinos Kryptos Chalkias, François Garillot, Jonas Lindstrøm, Ben Riva, Arnab Roy, Alberto Sonnino, Pun Waiwitlikhit, Joy Wang:
Subset-optimized BLS Multi-signature with Key Aggregation. IACR Cryptol. ePrint Arch. 2023: 498 (2023) - [i18]Panagiotis Chatzigiannis, Konstantinos Chalkias, Aniket Kate, Easwar Vivek Mangipudi, Mohsen Minaei, Mainack Mondal:
SoK: Web3 Recovery Mechanisms. IACR Cryptol. ePrint Arch. 2023: 1575 (2023) - 2022
- [c26]Irakliy Khaburzaniya, Konstantinos Chalkias, Kevin Lewi, Harjasleen Malvai:
Aggregating and Thresholdizing Hash-based Signatures using STARKs. AsiaCCS 2022: 393-407 - [c25]Konstantinos Chalkias, Panagiotis Chatzigiannis:
Base64 Malleability in Practice. AsiaCCS 2022: 1219-1221 - [c24]Konstantinos Chalkias, Panagiotis Chatzigiannis, Yan Ji:
Broken Proofs of Solvency in Blockchain Custodial Wallets and Exchanges. Financial Cryptography Workshops 2022: 106-117 - [c23]Panagiotis Chatzigiannis, Foteini Baldimtsi, Konstantinos Chalkias:
SoK: Blockchain Light Clients. Financial Cryptography 2022: 615-641 - [i17]Konstantinos Chalkias, Panagiotis Chatzigiannis, Yan Ji:
Broken Proofs of Solvency in Blockchain Custodial Wallets and Exchanges. IACR Cryptol. ePrint Arch. 2022: 43 (2022) - [i16]Panagiotis Chatzigiannis, Konstantinos Chalkias:
Base64 Malleability in Practice. IACR Cryptol. ePrint Arch. 2022: 361 (2022) - [i15]Foteini Baldimtsi, Konstantinos Chalkias, Panagiotis Chatzigiannis, Mahimna Kelkar:
Truncator: Time-space Tradeoff of Cryptographic Primitives. IACR Cryptol. ePrint Arch. 2022: 1581 (2022) - 2021
- [j1]Konstantinos Chalkias, Shir Cohen, Kevin Lewi, Fredric Moezinia, Yolan Romailler:
HashWires: Hyperefficient Credential-Based Range Proofs. Proc. Priv. Enhancing Technol. 2021(4): 76-95 (2021) - [c22]Panagiotis Chatzigiannis, Konstantinos Chalkias:
Proof of Assets in the Diem Blockchain. ACNS Workshops 2021: 27-41 - [c21]Panagiotis Chatzigiannis, Foteini Baldimtsi, Konstantinos Chalkias:
SoK: Auditability and Accountability in Distributed Payment Systems. ACNS (2) 2021: 311-337 - [c20]Yan Ji, Konstantinos Chalkias:
Generalized Proof of Liabilities. CCS 2021: 3465-3486 - [c19]Konstantinos Chalkias, François Garillot, Yashvanth Kondi, Valeria Nikolaenko:
Non-interactive Half-Aggregation of EdDSA and Variants of Schnorr Signatures. CT-RSA 2021: 577-608 - [c18]Panagiotis Chatzigiannis, Konstantinos Chalkias, Valeria Nikolaenko:
Homomorphic Decryption in Blockchains via Compressed Discrete-Log Lookup Tables. DPM/CBT@ESORICS 2021: 328-339 - [c17]Sam Blackshear, Konstantinos Chalkias, Panagiotis Chatzigiannis, Riyaz Faizullabhoy, Irakliy Khaburzaniya, Eleftherios Kokoris-Kogias, Joshua Lind, David Wong, Tim Zakian:
Reactive Key-Loss Protection in Blockchains. Financial Cryptography Workshops 2021: 431-450 - [i14]Panagiotis Chatzigiannis, Foteini Baldimtsi, Konstantinos Chalkias:
SoK: Auditability and Accountability in Distributed Payment Systems. IACR Cryptol. ePrint Arch. 2021: 239 (2021) - [i13]Sam Blackshear, Konstantinos Chalkias, Panagiotis Chatzigiannis, Riyaz Faizullabhoy, Irakliy Khaburzaniya, Eleftherios Kokoris-Kogias, Joshua Lind, David Wong, Tim Zakian:
Reactive Key-Loss Protection in Blockchains. IACR Cryptol. ePrint Arch. 2021: 289 (2021) - [i12]Konstantinos Chalkias, Shir Cohen, Kevin Lewi, Fredric Moezinia, Yolan Romailler:
HashWires: Hyperefficient Credential-Based Range Proofs. IACR Cryptol. ePrint Arch. 2021: 297 (2021) - [i11]Konstantinos Chalkias, François Garillot, Yashvanth Kondi, Valeria Nikolaenko:
Non-interactive half-aggregation of EdDSA and variants of Schnorr signatures. IACR Cryptol. ePrint Arch. 2021: 350 (2021) - [i10]Panagiotis Chatzigiannis, Konstantinos Chalkias:
Proof of Assets in the Diem Blockchain. IACR Cryptol. ePrint Arch. 2021: 598 (2021) - [i9]Panagiotis Chatzigiannis, Konstantinos Chalkias, Valeria Nikolaenko:
Homomorphic decryption in blockchains via compressed discrete-log lookup tables. IACR Cryptol. ePrint Arch. 2021: 899 (2021) - [i8]Irakliy Khaburzaniya, Konstantinos Chalkias, Kevin Lewi, Harjasleen Malvai:
Aggregating hash-based signatures using STARKs. IACR Cryptol. ePrint Arch. 2021: 1048 (2021) - [i7]Yan Ji, Konstantinos Chalkias:
Generalized Proof of Liabilities. IACR Cryptol. ePrint Arch. 2021: 1350 (2021) - [i6]Donald Beaver, Konstantinos Chalkias, Mahimna Kelkar, Lefteris Kokoris-Kogias, Kevin Lewi, Ladi de Naurois, Valeria Nicolaenko, Arnab Roy, Alberto Sonnino:
STROBE: Stake-based Threshold Random Beacons. IACR Cryptol. ePrint Arch. 2021: 1643 (2021) - [i5]Panagiotis Chatzigiannis, Foteini Baldimtsi, Konstantinos Chalkias:
SoK: Blockchain Light Clients. IACR Cryptol. ePrint Arch. 2021: 1657 (2021) - 2020
- [c16]Konstantinos Chalkias, François Garillot, Valeria Nikolaenko:
Taming the Many EdDSAs. SSR 2020: 67-90 - [i4]Konstantinos Chalkias, Kevin Lewi, Payman Mohassel, Valeria Nikolaenko:
Distributed Auditing Proofs of Liabilities. IACR Cryptol. ePrint Arch. 2020: 468 (2020) - [i3]Konstantinos Chalkias, François Garillot, Valeria Nikolaenko:
Taming the many EdDSAs. IACR Cryptol. ePrint Arch. 2020: 1244 (2020)
2010 – 2019
- 2018
- [c15]Konstantinos Chalkias, James Brown, Mike Hearn, Tommy Lillehagen, Igor Nitto, Thomas Schroeter:
Blockchained Post-Quantum Signatures. iThings/GreenCom/CPSCom/SmartData 2018: 1196-1203 - [i2]Konstantinos Chalkias, James Brown, Mike Hearn, Tommy Lillehagen, Igor Nitto, Thomas Schroeter:
Blockchained Post-Quantum Signatures. IACR Cryptol. ePrint Arch. 2018: 658 (2018) - 2016
- [c14]K. Harald Gjermundrød, Konstantinos Chalkias, Ioanna Dionysiou:
Going Beyond the Coinbase Transaction Fee: Alternative Reward Schemes for Miners in Blockchain Systems. PCI 2016: 35 - 2012
- [c13]Antigoni Polychroniadou, Konstantinos Chalkias, George Stephanides:
The Concept of Compatibility between Identity-based and Certificateless Encryption Schemes. SECRYPT 2012: 403-407 - [c12]Antigoni Polychroniadou, Konstantinos Chalkias, George Stephanides:
A Compatible Implementation between Identity-based and Certificateless Encryption Schemes. WEBIST 2012: 225-230 - 2010
- [b1]Konstantinos Chalkias:
Secure cryptographic protocols and applications based on bilinear pairings. University of Macedonia Economic and Social Sciences, Greece, 2010 - [c11]Kyriacos Talattinis, Aikaterini Sidiropoulou, Konstantinos Chalkias, George Stephanides:
Parallel Collection of Live Data Using Hadoop. Panhellenic Conference on Informatics 2010: 66-71 - [c10]Anastasios Kihidis, Konstantinos Chalkias, George Stephanides:
Practical Implementation of Identity Based Encryption for Secure E-mail Communication. Panhellenic Conference on Informatics 2010: 101-106 - [i1]Konstantinos Chalkias, Foteini Baldimtsi, Dimitrios Hristu-Varsakelis, Spyros T. Halkidis, George Stephanides:
Attacks on the AKACP Protocol. IACR Cryptol. ePrint Arch. 2010: 500 (2010)
2000 – 2009
- 2008
- [c9]Konstantinos Chalkias, Foteini Baldimtsi, Dimitrios Hristu-Varsakelis, George Stephanides:
An Implementation Infrastructure for Server-Passive Timed-Release Cryptography. IAS 2008: 89-94 - [c8]George E. Violettas, Tryfon Theodorou, Konstantinos Chalkias, George Stephanides:
Surveying Wi-Fi Security - Presentation of Wi-Fi Security Measures, Varius Wi-Fi Attacks and a Classification Survey of Wi-Fi Networks in Thessaloniki. WINSYS 2008: 96-101 - 2007
- [c7]Dimitrios Hristu-Varsakelis, Konstantinos Chalkias, George Stephanides:
Low-cost Anonymous Timed-Release Encryption. IAS 2007: 77-82 - [c6]Konstantinos Chalkias, Spyros T. Halkidis, Dimitrios Hristu-Varsakelis, George Stephanides, Anastasios Alexiadis:
A Provably Secure One-Pass Two-Party Key Establishment Protocol. Inscrypt 2007: 108-122 - [c5]Konstantinos Chalkias, Dimitrios Hristu-Varsakelis, George Stephanides:
Improved Anonymous Timed-Release Encryption. ESORICS 2007: 311-326 - [c4]Konstantinos Chalkias, Foteini Baldimtsi, Dimitris Hristu-Varsakelis, George Stephanides:
Two Types of Key-Compromise Impersonation Attacks against One-Pass Key Establishment Protocols. ICETE (Selected Papers) 2007: 227-238 - [c3]Konstantinos Chalkias, F. Mpaldimtsi, Dimitris Hristu-Varsakelis, George Stephanides:
On the Key-Compromise Impersonation Vulnerability of One-Pass Key Establishment Protocols. SECRYPT 2007: 222-228 - 2006
- [c2]Konstantinos Chalkias, George Stephanides:
Timed Release Cryptography from Bilinear Pairings Using Hash Chains. Communications and Multimedia Security 2006: 130-140 - 2005
- [c1]Konstantinos Chalkias, George Filiadis, George Stephanides:
Implementing Authentication Protocol for Exchanging Encrypted Messages via an Authentication Server based on Elliptic Curve Cryptography with the ElGamal's Algorithm. IEC (Prague) 2005: 137-142
Coauthor Index
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