VLSI design of RSA cryptosystem based on the Chinese remainder theorem

Chung Hsien Wu, Jin Hua Hong, Cheng Wen Wu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This paper presents the design and implementation of a systolic RSA cryptosystem based on a modified Montgomery's algorithm and the Chinese Remainder Theorem (CRT) technique. The CRT technique improves the throughput rate up to 4 times in the best case. The processing unit of the systolic array has 100% utilization because of the proposed block interleaving technique for multiplication and square operations in the modular exponentiation algorithm. For 512-bit inputs, the number of clock cycles needed for a modular exponentiation is about 0.13 to 0.24 million. The critical path delay is 6.13ns using a 0.6μm CMOS technology. With a 150 MHz clock, we can achieve an encryption/decryption rate of about 328 to 578 Kb/s.

Original languageEnglish
Pages (from-to)967-979
Number of pages13
JournalJournal of Information Science and Engineering
Issue number6
Publication statusPublished - 2001 Nov 1

All Science Journal Classification (ASJC) codes

  • Software
  • Human-Computer Interaction
  • Hardware and Architecture
  • Library and Information Sciences
  • Computational Theory and Mathematics

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