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Research Group

Hanzlik

Cryptography is one of the main tools for achieving a secure and private digital world. The main objective of our group is to apply cryptography to practice. Topics we work on include privacy-preserving signatures and authentication methods. We also tackle practical problems related to using cryptography on constrained devices like smart cards or cryptographic tokens (e.g., FIDO).

Head of Group

Lucjan Hanzlik

Email

Address

Kaiserstraße 21
66386 St. Ingbert (Germany)

Members

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Khue Do

Eugenio Paracucchi

Aniketh Ashwath
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Gunnar Heide

Maksymilian Gorski

Pramath Subramanian

Esra Günsay

Simonas Kanapeckas
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Omar Renawi
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Kecheng Shi
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Xuan Bach Tran

Most Recent Publications

Year 2026

2026

ETK: External-Operations TreeKEM and the Security of MLS in RFC 9420

Conference / Medium

International Conference on the Theory and Application of Cryptographic Techniques (EuroCrypt)
ETK: External-Operations TreeKEM and the Security of MLS in RFC 9420

Tags
Trustworthy Information Processing
Authors
Full Paper Visit Detail Page

Year 2025

2025-06-20

VRaaS: Verifiable Randomness as a Service on Blockchains

Conference / Medium

IEEE Computer Security Foundations Symposium (CSF)
VRaaS: Verifiable Randomness as a Service on Blockchains

Tags
Authors
  • Jacob Gorman
  • Lucjan Hanzlik
  • Aniket Kate
  • Easwar Vivek Mangipudi
  • Pratyay Mukherjee
  • Pratik Sarkar
  • Sri AravindaKrishnan Thyagarajan
Full Paper Visit Detail Page
2025-06-16

Vitārit: Paying for Threshold Services on Bitcoin and Friends

Conference / Medium

IEEE Symposium on Security and Privacy (S&P)
Vitārit: Paying for Threshold Services on Bitcoin and Friends

Tags
Algorithmic Foundations and Cryptography
Authors
  • Sri AravindaKrishnan Thyagarajan
  • Easwar Vivek Mangipudi
  • Lucjan Hanzlik
  • Aniket Kate
  • Pratyay Mukherjee
Full Paper Visit Detail Page
2025-05-12

VITARIT: Paying for Threshold Services on Bitcoin and Friends

Conference / Medium

IEEE Symposium on Security and Privacy (S&P)

Tags
Algorithmic Foundations and Cryptography
Authors
  • Lucjan Hanzlik
  • Aniket Kate
  • Easwar Vivek Mangipudi
  • Pratyay Mukherjee
  • Sri AravindaKrishnan Thyagarajan
Full Paper Visit Detail Page
2025-04-03

Non-Interactive Blind Signatures from RSA Assumption and More

Conference / Medium

International Conference on the Theory and Application of Cryptographic Techniques (EuroCrypt)
Non-Interactive Blind Signatures from RSA Assumption and More

Tags
Algorithmic Foundations and Cryptography
Authors
Full Paper Visit Detail Page