News
GradesWritten on 18.02.23 by Lucjan Hanzlik Dear All, Grades are up in the LSF system. Best, Lucjan Hanzlik |
Zoom LinkWritten on 02.02.23 by Lucjan Hanzlik Dear All, The Zoom migration did not change the links, Best, Lucjan Hanzlik |
II roundWritten on 30.12.22 by Lucjan Hanzlik Dear All, Our next meeting will take place on 09.01.2023. You can find the full list of dates on the main CMS page. Happy New Year, Lucjan Hanzlik |
Zoom LinkWritten on 20.11.22 by Lucjan Hanzlik Dear All, tomorrow we will start with the first session. See you tomorrow at 16:15, Lucjan Hanzlik |
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Written on 14.11.22 by Lucjan Hanzlik Dear All, we will start next week with a short kick-off and the first presentations. Best, Lucjan Hanzlik |
Proseminar time and paper assignmentWritten on 08.11.22 by Lucjan Hanzlik Dear All, thank you for your preferences for the papers. According to the doodle, the time that fits almost all is Monday, 16:15-17:45. Dear All, thank you for your preferences for the papers. According to the doodle, the time that fits almost all is Monday, 16:15-17:45. Thanks, Lucjan Hanzlik
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Registration for the proseminar is not possible directly. Please use the CS department assignment system to register your interest.
Introduction to Digital and Privacy-Preserving Signatures
Digital signatures are a basic cryptographic building block that ensures messages' authenticity (who signed) and integrity (what is signed).
The goal of this proseminar is to improve students' presentation skills and, at the same time, learn about digital signatures and schemes
that relax the above properties to increase the privacy of signers. We will discuss seminal research papers introducing, among others:
Ring signatures, group signatures, and blind signatures.
Each week two students will present their assigned paper, followed by a group discussion about the presentation and the article
(it is highly encouraged that all students have read the article). After the first round, there will be a second round where students
will present their improved presentation, and only the second round will be graded.
The kick-off meeting will be during the first week of lectures. The proseminar will be held in English and remotely via Zoom.
Logistics
Time: Monday 16:15-17:45
Venue
Zoom
Instructor
Lucjan Hanzlik (lucjan.hanzlik@cispa.de)
Topics
Standard Signatures
1. Rivest, Shamir, Adleman: A method for obtaining digital signatures and public-key cryptosystems (alternatively link1 and link2) [09.01.2023 - II round]
2. Johnson, Menezes: Elliptic curve DSA (ECDSA): an enhanced DSA [09.01.2023 - II round]
Advanced Signatures
3. Boneh, Lynn, Shacham: Short Signatures from the Weil Pairing [16.01.2023 - II round]
4. Ducas, Kiltz, Lepoint, Lyubashevsky, Schwabe, Seiler, Stehlé: CRYSTALS-Dilithium: A Lattice-Based Digital Signature Scheme [16.01.2023 - II round]
Privacy-Preserving Signatures
5. Rivest, Shamir, Rivest: How to Leak a Secret [23.01.2023 - II round]
6. Bellare, Micciancio, Warinschi: Foundations of Group Signatures: Formal Definitions, Simplified Requirements, and a Construction Based on General Assumptions [23.01.2023 - II round]
7. Chaum, Fiat, Naor: Blind Signatures for Untraceable Payments (alternative link) and Untraceable Electronic Cash (2 short papers on the same topic) [30.01.2023 - II round]
Signatures in Cryptocurrencies
8. Boneh, Drijvers, Neven: Compact Multi-Signatures for Smaller Blockchains [30.01.2023 - II round]
9. Aumayr, Ersoy, Erwig, Faust, Hostakova, Maffei, Moreno-Sanchez, Riahi: Generalized Channels from Limited Blockchain Scripts and Adaptor Signatures [06.02.2023 - II round]
10. Thyagarajan, Malavolta: Lockable Signatures for Blockchains: Scriptless Scripts for All Signatures [06.02.2023 - II round]