P2 - Sanitizable Signatures

P2 – Sanitizable Cryptography

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The project considers sanitization of authenticated encryptions. Such encryptions occur in secure channel protocols where the sender securely transmits data to a receiver via a service provider. The overall goal is to incorporate the possibility that a service provider can, if the sender or receiver supports this, modify the encrypted transmission in a controlled way, e.g., truncate the communication data at designated places if the receiver has a low bandwidth. The solutions will be smoothly integrable with the common channel protocols.

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 .
[ Konferenzveröffentlichung] , (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
[ Konferenzveröffentlichung] , (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
[ Konferenzveröffentlichung] , (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)
[ Konferenzveröffentlichung] , (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
[ Konferenzveröffentlichung] , (2016)

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