Self-Generated-Certificate Public Key Cryptography and certificateless signature/encryption scheme in the standard model

Joseph K. Liu, Man Ho Au, Willy Susilo

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

181 Citations (Scopus)


Certificateless Public Key Cryptography (CL-PKC) enjoys a number of features of Identity-Based Cryptography (IBC) while without having the problem of key escrow. However, it does suffer from an attack where the adversary, Carol, replaces Alice's public key by someone's public key so that Bob, who wants to send an encrypted message to Alice, uses Alice's identity and other's public key as the inputs to the encryption function. As a result, Alice cannot decrypt the message while Bob is unaware of this. We call it Denial-of-Decryption (DoD) Attack as its nature is similar to the well known Denial-of-Service (DoS) Attack. Based on CL-PKC, we propose a new paradigm called Self-Generated-Certificate Public Key Cryptography (SGC-PKC) that captures the DoD Attack. We also provide a generic construction of a self-generated-certificate public key encryption scheme in the standard model. Our generic construction uses certificateless signature and certificateless encryption as the building block. In addition, we further propose a certificateless signature and a certificateless encryption scheme with concrete implementation that are all provably secure in the standard model, which are the first in the literature regardless of the generic constructions by Yum and Lee which may contain security weaknesses as pointed out by others. We believe these concrete implementations are of independent interest.

Original languageEnglish
Title of host publicationProceedings of the 2nd ACM Symposium on Information, Computer and Communications Security
Place of PublicationNew York NY USA
PublisherAssociation for Computing Machinery (ACM)
Number of pages11
ISBN (Electronic)1595935746
ISBN (Print)9781595935748
Publication statusPublished - 2007
Externally publishedYes
EventACM Symposium on Information, Computer and Communications Security 2007 - Singapore, Singapore
Duration: 20 Mar 200722 Mar 2007
Conference number: 2nd


ConferenceACM Symposium on Information, Computer and Communications Security 2007
Abbreviated titleAsiaCCS 2007
Internet address


  • Certificateless encryption
  • Certificateless signature

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