On the Chikazawa-Inoue ID based key system

Bae Eun Jung; Hee Jean Kim

Paper 2008/074

On the Chikazawa-Inoue ID based key system

Bae Eun Jung and Hee Jean Kim

Abstract

In this paper, we show that Chikazawa-Inoue ID-based key system is insecure by collusion, where Chikazawa-Inoue ID-based key system means the key parameters established during the initiation phase. We describe an algorithm factorizing a public key of Trust Center. Since our attack is based on only the key system and has no relation with specific key sharing protocols, it can be applied to all variant protocols of Chikazawa-Inoue ID based key sharing protocol. From this analysis, we obtain conclusions that Chikazawa-Inoue ID-based key system cannot be used any more for any application protocols.

Metadata

Available format(s): PDF
Publication info: Published elsewhere. Integer factorization, collusion attack, Chikazawa-Inoue ID key system
Keywords: public key integer factorization collusion attack Chikazawa-Inoue ID based key system
Contact author(s): be jung @ samsung com
History: 2008-02-19: last of 2 revisions; 2008-02-18: received; See all versions
Short URL: https://ia.cr/2008/074
License: CC BY

BibTeX

@misc{cryptoeprint:2008/074,
      author = {Bae Eun Jung and Hee Jean Kim},
      title = {On the Chikazawa-Inoue {ID} based key system},
      howpublished = {Cryptology {ePrint} Archive, Paper 2008/074},
      year = {2008},
      url = {https://eprint.iacr.org/2008/074}
}