Digital and Privacy-Preserving Signatures Lucjan Hanzlik, Kamil Kluczniak

News

01.12.2021

No Seminar on 6.12

Dear All,

there will be no seminar next Monday (6.12). 

One student  dropped our and one presentation was postponed.
The schedule for other presentations remains the same.

Lucjan Hanzlik

 

15.11.2021

Permanent zoom link

Dear All,

 

we will use the following meeting room for all sessions:

https://cispa-de.zoom.us/j/98327697564?pwd=bVpVSzZRN2plSVdOZUhOVGN2bkpZQT09

 

Lucjan Hanzlik

30.10.2021

Paper Assignment

Dear All,

the paper assignment is online. You can find the PDF in the materials section on the CMS website.

 

Regards,

Lucjan

27.10.2021

Kick-off Meeting

Dear All,

below the zoom link for the meeting tomorrow. Do not forget to send me your paper preferences by the end of today.

 

Topic: Digital and Privacy-Preserving Signatures - Kick-off
Time: Oct 28, 2021 04:00 PM Amsterdam, Berlin, Rome, Stockholm,... Read more

Dear All,

below the zoom link for the meeting tomorrow. Do not forget to send me your paper preferences by the end of today.

 

Topic: Digital and Privacy-Preserving Signatures - Kick-off
Time: Oct 28, 2021 04:00 PM Amsterdam, Berlin, Rome, Stockholm, Vienna

Join Zoom Meeting
https://cispa-de.zoom.us/j/96612828759?pwd=V1FOazluUWF1dHA0MW02WVBwSHZHUT09

Meeting ID: 966 1282 8759
Passcode: !@H3RA

Thanks,

Lucjan

 

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. 
In this seminar, we will learn about different types of digital signatures including not only standard RSA and ECDSA signature schemes but also recent schemes secure against quantum adversaries.

We will also take a look at signature schemes that relax the authenticity and integrity properties to increase the privacy of users and/or message like e.g.:
- ring signatures used in the Monero cryptocurrency, 
- pseudonymous signatures used in the German eID, and 
- blind signatures used in e-Cash.

Each week we will discuss papers which will be presented by assigned students. 
All students are required to read the papers carefully and prepare a list of questions for discussion.

The seminar will be held in English.

 

Venue

Zoom, Monday 14:15-15:45

 

Papers

Digital Signatures Foundations

1) Security proofs for signature schemes. [15.11.2021]

2) A method for obtaining digital signatures and public-key cryptosystems (alternatively link1 and link2). [15.11.2021]

3) How to Prove Yourself: Practical Solutions to Identification and Signature Problems. [22.11.2021]

Advanced Signatures

4) Short Signatures Without Random Oracles. [29.11.2021] 

5) Short Signatures from the Weil Pairing. [29.11.2021]

6) Compact Multi-Signatures for Smaller Blockchains. [22.11.2021]

PQ Signatures

7) Fiat-Shamir with Aborts: Applications to Lattice and Factoring-Based Signatures. [6.12.2021]

8) CRYSTALS-Dilithium: A Lattice-Based Digital Signature Scheme [6.12.2021]

9) Lattice Signatures Without Trapdoors. [13.12.2021]

Privacy-Preserving Signatures

10) How to Leak a Secret. [13.12.2021]

11) Foundations of Group Signatures: Formal Definitions, Simplified Requirements, and a Construction Based on General Assumptions. [20.12.2021]

12) Short Group Signatures [20.12.2021]

13) Direct Anonymous Attestation. [3.01.2022]

14) Domain-Specific Pseudonymous Signatures for the German Identity Card. [3.01.2022]

15) Sanitizable signatures. [10.01.2022]

16) Structure-Preserving Signatures on Equivalence Classes and Constant-Size Anonymous Credentials. [10.01.2022]

 

Instructors

Lucjan Hanzlik (lucjan.hanzlik@cispa.de)

Kamil Kluczniak (kamil.kluczniak@cispa.de)

 



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