Research activities

Program Committee


Invited Talks


  • Compact Structure-preserving Signatures with Almost Tight Security
    11th Workshop on Publick Key Cryptography: Secure Constructions and Its Applications, Mar. 2018
  • Watermarking Cryptographic Capabilities
    10th Workshop on Publick Key Cryptography: Secure Constructions and Its Applications, Feb. 2017
  • Anonymous Traitor Tracing: How to Embed Arbitrary Information in a Key
    ISEC, Sep. 2016
  • Re-Encryption, Functional Re-Encryption, and Multi-Hop Re-Encryption: A Framework for Achieving Obfuscation-Based Security and Instantiations from Lattices
    Jinbo-cho Angou Workshop, Jun. 2014
  • How to Watermark Cryptographic Functions
    7th Workshop on Publick Key Cryptography: Secure Constructions and Its Applications, Mar. 2014
    ISEC, Sep. 2013
  • Verifiably Encrypted Signatures with Short Keys based on the Decisional Linear Problem and Obfuscation for Encrypted VES
    Jinbo-cho Angou Workshop, Jun. 2013
  • Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions
    6th Workshop on Publick Key Cryptography: Secure Constructions and Its Applications, Mar. 2013

Seminar Talks


  • Anonymous Traitor Tracing: How to Embed Arbitrary Information in a Key Shin-Akarui-Angou-Benkyou-Kai, Mar. 2016
  • Watermarking Cryptographic Capabilities
    ENS Crypto Team, May. 2016
    Shin-Akarui-Angou-Benkyou-Kai, Apr. 2016
    UCLA Obfuscation seminar, Nov. 2015
  • Watermarking Cryptographic Programs Against Arbitrary Removal Strategies
    Boston University, BUSec Seminar, May. 2015
  • How to Watermark Cryptographic Functions
    Northeastern University, Theory Seminar, Nov. 2014
    Shin-Akarui-Angou-Benkyou-Kai, May. 2013
  • Constant-Size Structure-Preserving Signatures: Generic Constructions and Simple Assumptions
    Shin-Akarui-Angou-Benkyou-Kai, Nov. 2012

Internship Students


I worked (or am working) with the following students.

  • Léonard Assouline from ENS Lyon (Summer 2018)
  • Alex Davidson from Royal Holloway (Spring 2018)
  • Alexander Koch from KIT (Summer 2017)
  • Fuyuki Kitagawa from Tokyo Tech (Summer 2016)
  • Jiaxin Pan from Ruhr university Bochum (Spring 2016)
  • Takashi Yamakawa from the university of Tokyo (Summer 2014)
  • Angela Zottarel from Aarhus university (Summer 2012)

Organization