The security of the BLT signature scheme with practical implementation issues

Authors

  • Trieu Quang Phong Institute of Cryptography Science and Technology
  • Vo Tung Linh

DOI:

https://doi.org/10.54654/isj.v2i14.146

Keywords:

Lược đồ chữ ký BLT, hạ tầng KSI, giả mạo tồn tại, tính chống chối bỏ, cây băm Merkle. the BLT signature scheme, KSI infrastructure, non-repudiation, Merkle tree.

Tóm tắt

Abstract— KSI infrastructure is a time-stamping and server-based signature solution deployed in Estonia to provide the integrity and timing information of data. With the goal of providing a personal signature that does not depend on the long-term secrecy of signing keys, Buldas et al. have proposed a BLT scheme that is based on the KSI infrastructure. Although Buldas et al. have shown that the (modified) BLT scheme is secure in the theoretical model, the fact that its practical implementation does not follow that description. In this paper, we will evaluate and provide two attack scenarios if the BLT schema is implemented in such a way, and then propose a solution to that problem.

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Published

2022-01-14

How to Cite

Phong, T. Q., & Linh, V. T. (2022). The security of the BLT signature scheme with practical implementation issues. Journal of Science and Technology on Information Security, 2(14), 35-44. https://doi.org/10.54654/isj.v2i14.146

Issue

No 2. CS (14) 2021

Section

Papers

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2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).