Perfect-reconstruction encryption scheme by using periodically time-varying digital filters

Xuedong Yang, Masayuki Kawamata, Tatsuo Higuchi

Research output: Contribution to journalArticlepeer-review


This letter proposes a Perfect-Reconstruction (PR) encryption scheme based on a PR QMF bank. Using the proposed scheme, signals can be encrypted and reconstructed perfectly by using two Periodically Time-Varying (PTV) digital filters respectively. Also we find that the proposed scheme has a `good' encryption effect and compares favorably with frequency scramble in the aspects computation complexity, PR property, and degree of security.

Original languageEnglish
Pages (from-to)192-196
Number of pages5
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number1
Publication statusPublished - 1998 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Signal Processing
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering
  • Applied Mathematics


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