No meeting on 13.05

Written on 07.05.21 by Lucjan Hanzlik

Dear All,

we will not have a meeting next week because of holidays. 

So our next round of presentation will be on the 20.05.

Have a nice weekend,

Lucjan Hanzlik

Zoom link

Written on 29.04.21 by Lucjan Hanzlik

Dear All,

attached please find the zoom link. We will be using this meeting room for all our meeting.


Topic: Introduction to Digital and… Read more

Dear All,

attached please find the zoom link. We will be using this meeting room for all our meeting.


Topic: Introduction to Digital and Privacy-Preserving Signatures - Proseminar
Time: This is a recurring meeting Meet anytime

Join Zoom Meeting

Meeting ID: 983 2769 7564
Passcode: 3g%s#S

Privacy Notice:
Please refer to for our privacy notice regarding the use of Zoom at CISPA



Lucjan Hanzlik

Kick-off Meeting Link

Written on 22.04.21 by Lucjan Hanzlik

Topic: IDPSS Kick-off meeting

Time: Apr 22, 2021 04:15 PM Amsterdam, Berlin, Rome, Stockholm, Vienna

Join Zoom Meeting

Meeting ID: 963 3432 8574

Passcode: 5b!Z+Z

Introduction to Digital and Privacy-Preserving Signatures


Digital signatures are a basic cryptographic building block that ensures authenticity (who signed) and integrity (what is signed) of messages. 
The goal of this proseminar is to improve the presentation skills of students 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:
standard signatures, short signatures, lattice based signatures, 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 paper
(it is highly encouraged that all students have read the paper). 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.


Time: Thursdays 16:15-17:45 (Kick-off meeting 22.04)






Lucjan Hanzlik (



Standard Signatures

    1. Rivest, Shamir, Adleman: A method for obtaining digital signatures and public-key cryptosystems (alternatively link1 and link2)
    2. Fiat, Shamir: How to Prove Yourself: Practical Solutions to Identification and Signature Problems
    3. Schnorr: Efficient Identification and Signatures for Smart Cards
    4. Johnson, Menezes: Elliptic curve DSA (ECDSA): an enhanced DSA

Advanced Signatures

    5. Boneh, Lynn, Shacham: Short Signatures from the Weil Pairing
    6. Boneh, Boyen: Short Signatures Without Random Oracles
    7. Lyubashevsky: Fiat-Shamir with Aborts: Applications to Lattice and Factoring-Based Signatures
    8. Ducas, Kiltz, Lepoint, Lyubashevsky, Schwabe, Seiler, Stehlé: CRYSTALS-Dilithium: A Lattice-Based Digital Signature Scheme

Privacy-Preserving Signatures

    9. Rivest, Shamir, Rivest: How to Leak a Secret
    10. Bellare, Micciancio, Warinschi: Foundations of Group Signatures: Formal Definitions, Simplified Requirements, and a Construction Based on General Assumptions
    11. Chaum, Fiat, Naor: Blind Signatures for Untraceable Payments (alternative link)  and Untraceable Electronic Cash (2 short papers on the same topic)
    12. Lai, Ronge, Ruffing, Schröder, Aravinda, Wang: Omniring: Scaling Private Payments Without Trusted Setup

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