Panagiotis Chatzigiannis

Staff Research Scientist - Visa Research

About Me

Hello, I’m a Panagiotis (Panos). I joined Visa Research as Staff Research Scientist in June 2022. I completed my PhD at George Mason University in June 2022 under the supervision of Dr. Foteini Baldimtsi. My research lies in the field of cryptography and blockchains, focusing on blockchain auditability and auditable - accountable payment systems, blockchain on resource-constrained devices and improving usability of blockchain applications.

I worked as a summer intern and a part-time researcher with Facebook/Novi.

Publications

  1. Diversification across mining pools: Optimal mining strategies under PoW https://arxiv.org/pdf/1905.04624.pdf (WEIS2019)

  2. Black-Box IoT: Authentication and Distributed Storage of IoT Data from Constrained Sensors https://arxiv.org/pdf/2103.04028.pdf (IoTDI2021)

  3. Reactive Key-Loss Protection in Blockchains https://eprint.iacr.org/2021/289.pdf (WTSC FC21 Workshop)

  4. SoK: Auditability and Accountability in Distributed Payment Systems https://eprint.iacr.org/2021/239.pdf (ACNS 2021)

  5. MiniLedger: Compact-sized Anonymous and Auditable Distributed Payments https://eprint.iacr.org/2021/869.pdf (ESORICS 2021)

  6. Proof of Assets in the Diem Blockchain https://eprint.iacr.org/2021/598.pdf (AIBlock 2021)

  7. Homomorphic decryption in blockchains via compressed discrete-log lookup tables https://eprint.iacr.org/2021/899.pdf (CBT 2021)

  8. SoK: Blockchain Light Clients https://eprint.iacr.org/2021/1657.pdf (to appear in FC 2022)

  9. Broken Proofs of Solvency in Blockchain Custodial Wallets and Exchanges https://eprint.iacr.org/2022/043.pdf

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