P2 - Sanitizable Signatures

P2 – Sanitizable Signatures

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Sanitizable signature schemes enable a designated party, the sanitizer, to modify designated parts of the message upon authorization of the signer without invalidating the signature. This project advances the field of sanitizable signatures by extending the approach to message authentication codes, by looking at the task of sanitizing encrypted data, by investigating relationships to other signature schemes, and by building solutions under mild assumptions.

Researchers

Patrick Harasser
Cryptoplexity

Research Interests:

  • Provable security
  • Sanitizable signatures
  • Sanitizable channels
  • Sigma protocols

Sogol Mazaheri
Cryptoplexity

Research Interests:

  • Provable security
  • Privacy and security of cryptographic protocols.
  • Cryptographic primitives and their relationships
  • Hardware-assisted cryptography

Publications

Ece, Olcay :
Security of E-Mail-Encryption.
TU Darmstadt
[Bachelorarbeit] , (2018)

Fischlin, Marc ; Harasser, Patrick :
Invisible Sanitizable Signatures and Public-Key Encryption are Equivalent.
[Online-Edition: https://www.springer.com/us/book/9783319933863]
In: 16th International Conference, ACNS 2018, 2.7.-4.7. 2018, Leuven, Belgium. In: Springer International Publishing , LNCS 10892 .
[Conference or workshop item] , (2018)

Kiel, Robert :
Zero-Knowledge Contingent Payments.
TU Darmstadt
[Masterarbeit] , (2018)

Günther, Felix ; Mazaheri, Sogol :
A Formal Treatment of Multi-key Channels.
CRYPTO 2017 - 37th International Cryptology Conference Springer
[Conference or workshop item] , (2017)

Erwig, Andreas ; Fischlin, Marc ; Hald, Martin ; Helm, Dominik ; Kiel, Robert ; Kübler, Florian ; Kümmerlin, Michael ; Laenge, Jakob ; Rohrbach, Felix :
Redactable Graph Hashing, Revisited.
ACISP 2017
[Conference or workshop item] , (2017)

Marson, Giorgia Azzurra ; Poettering, Bertram :
Security Notions for Bidirectional Channels.
In: IACR Transactions on Symmetric Cryptology, 2017 (Volume 2017 Issue 1) S. 405-426.
[Article] , (2017)

Fischlin, Marc ; Herzberg, Amir ; Noon, Hon Bin ; Shulman, Haya :
Obfuscation Combiners.
International Cryptology Conference (CRYPTO)
[Conference or workshop item] , (2016)

Akleylek, Sedat ; Bindel, Nina ; Buchmann, Johannes ; Krämer, Juliane ; Marson, Giorgia Azzurra :
An Efficient Lattice-Based Signature Scheme with Provably Secure Instantiation.
International Conference on Cryptology AFRICACRYPT 2016 Springer
[Conference or workshop item] , (2016)

Bernhard, David ; Fischlin, Marc ; Warinschi, Bogdan :
On the Hardness of Proving CCA-Security of Signed ElGamal.
In: LNCS (9614). Springer
[Conference or workshop item] , (2016)

Fischlin, Marc ; Günther, Felix ; Marson, Giorgia Azzurra ; Paterson, Kenneth G. :
Data Is a Stream: Security of Stream-Based Channels.
Advances in Cryptology - CRYPTO 2015 Springer
[Conference or workshop item] , (2015)

Fehr, Victoria ; Fischlin, Marc :
Sanitizable Signcryption: Sanitization over Encrypted Data (Full Version).
In: IACR Cryptology ePrint Archive, 2015 S. 765.
[Article] , (2015)

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