1 / 15

Sanjit Chatterjee and Palash Sarkar 2007

Our identity-based signature scheme without random oracles is insecure & Constant Size Ciphertext HIBE in the Augmented Selective-ID Security Model and its Extensions. Sanjit Chatterjee and Palash Sarkar 2007 投影片製作：張淑慧.

laith-welch
Download Presentation

Sanjit Chatterjee and Palash Sarkar 2007

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Our identity-based signature scheme without random oracles is insecure &Constant Size Ciphertext HIBE in the Augmented Selective-ID Security Model and its Extensions Sanjit Chatterjee and Palash Sarkar 2007 投影片製作：張淑慧

  2. Outline • Part 1: Our identity-based signature scheme without random oracles is insecure. • Part 2: Constant Size Ciphertext HIBE in the Augmented Selective-ID Security Model and its Extensions (Sanjit Chatterjee and Palash Sarkar 2007)

  3. Our Scheme 1 ( insecure )( Modify Craig Gentry, and Zulfikar Ramzan : PKC 2006 )

  4. Analyze the Security of V(x)

  5. Constant Size Ciphertext HIBE in the Augmented Selective-ID Security Model and its Extensions Sanjit Chatterjee and Palash Sarkar 2007

  6. Hierarchical System without Random Oracles HIBE Efficient Selective-ID Secure Identity-Based Encryption Without Random Oracles Dan Boneh and Xavier Boyen Eurocrypt 2004 Hierarchical Identity-Based Encryption with Constant Size Ciphertext Dan Boneh, Xavier Boyen and Eu-Jin Goh Eurocrypt 2005 Generalization of the Selective-ID Security Model for HIBE Protocols Sanjit Chatterjee and Palash Sarkar PKC 2006 Constant Size Ciphertext HIBE in the Augmented Selective-ID Security Model and its Extensions Sanjit Chatterjee and Palash Sarkar 2007

  7. Review: Hierarchical Identity-Based Encryption with Constant Size CiphertextDan Boneh, Xavier Boyen and Eu-Jin Goh (Eurocrypt 2005) C

  8. Generalization of the Selective-ID Security Model for HIBE ProtocolsSanjit Chatterjeeand Palash Sarkar (PKC 2006)

  9. C This paper:Constant Size Ciphertext in Selective+-ID Model (i.e. Security model M1)

  10. Conclusion • Future research - To propose a unbounded number of levels of HIBE with constant size ciphertext in the security model M1. .END.

  11. Review:Generalization of the Selective-ID Security Model for HIBE ProtocolsSanjit Chatterjeeand Palash Sarkar (PKC 2006):HIBE H1 C

  12. Construct IBS Scheme IBS From a Standard Digital Signature Scheme SS(BNN04, Eurocrypt)

  13. Short signatures without random oracles (BB04)Dan Boneh and Xavier Boyen’s (Eurocrypt 2004)

  14. IDS from BB04

  15. IDS from BB04

More Related