Herwin Chan

Publications (9)0 Total impact

• Source

  Available from: citeseerx.ist.psu.edu

  Chapter: Iteration Bound Analysis and Throughput Optimum Architecture of SHA-256 (384,512) for Hardware Implementations

  Yong Ki Lee, Herwin Chan, Ingrid Verbauwhede
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  ABSTRACT: The hash algorithm forms the basis of many popular cryptographic protocols and it is therefore important to find throughput optimal implementations. Though there have been numerous published papers proposing high throughput architectures, none of them have claimed to be optimal. In this paper, we perform iteration bound analysis on the SHA2 family of hash algorithms. Using this technique, we are able to both calculate the theoretical maximum throughput and determine the architecture that achieves this throughput. In addition to providing the throughput optimal architecture for SHA2, the techniques presented can also be used to analyze and design optimal architectures for some other iterative hash algorithms. KeywordsSHA-256 (384;512)-Iteration Bound Analysis-Throughput Optimum Architecture
  01/2008: pages 102-114;
• Article: Design Methodology for Throughput Optimum Architectures of Hash Algorithms of the MD4-class.

  Yong Ki Lee, Herwin Chan, Ingrid Verbauwhede
  Signal Processing Systems. 01/2008; 53:89-102.
• Conference Proceeding: Iteration Bound Analysis and Throughput Optimum Architecture of SHA-256 (384, 512) for Hardware Implementations.

  Yong Ki Lee, Herwin Chan, Ingrid Verbauwhede
  Information Security Applications, 8th International Workshop, WISA 2007, Jeju Island, Korea, August 27-29, 2007, Revised Selected Papers; 01/2007
• Conference Proceeding: High Speed Channel Coding Architectures for the Uncoordinated OR Channel.

  Herwin Chan, Miguel Griot, Andres I. Vila Casado, Richard D. Wesel, Ingrid Verbauwhede
  2006 IEEE International Conference on Application-Specific Systems, Architecture and Processors (ASAP 2006), 11-13 September 2006, Steamboat Springs, Colorado, USA; 01/2006
• Source

  Available from: psu.edu

  Conference Proceeding: Process Isolation for Reconfigurable Hardware.

  Herwin Chan, Patrick Schaumont, Ingrid Verbauwhede
  Proceedings of the 2006 International Conference on Engineering of Reconfigurable Systems & Algorithms, ERSA 2006, Las Vegas, Nevada, USA, June 26-29, 2006; 01/2006
• Source

  Available from: psu.edu

  Conference Proceeding: Throughput Optimized SHA-1 Architecture Using Unfolding Transformation.

  Yong Ki Lee, Herwin Chan, Ingrid Verbauwhede
  2006 IEEE International Conference on Application-Specific Systems, Architecture and Processors (ASAP 2006), 11-13 September 2006, Steamboat Springs, Colorado, USA; 01/2006
• Article: Streaming Encryption for a Secure Wavelength and Time

  Herwin Chan, Alireza Hodjat, Jun Shi, Richard Wesel, Ingrid Verbauwhede
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  ABSTRACT: This paper describes a working implementation of a streaming encryption system for optical networks. The 10 Gbps data stream is encrypted on the physical level in both the wavelength and time domains. Security is obtained by applying a strong pseudo-random hopping pattern to both. The AES algorithm in counter mode is used to control the switches that implement the hopping permutations. Because of the high throughput requirements, aggressive parallelizing and pipelining techniques are used to achieve data rates of 10 Gbps.
  03/2004;
• Conference Proceeding: Streaming Encryption for a Secure Wavelength and Time Domain Hopped Optical Network.

  Herwin Chan, Alireza Hodjat, Jun Shi, Richard D. Wesel, Ingrid Verbauwhede
  International Conference on Information Technology: Coding and Computing (ITCC'04), Volume 2, April 5-7, 2004, Las Vegas, Nevada, USA; 01/2004
• Source

  Available from: psu.edu

  Article: Non-Linear Trellis Codes for Optical Applications

  Miguel Griot, Andres I Vila, Wen-Yen Weng, Herwin Chan, Richard Wesel
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  ABSTRACT: This paper presents nonlinear trellis codes that produce codewords with a relatively low density of ones. These trellis codes are designed specifi-cally for the Z-Channel that arises in a multiple-user optical channel with non-coherent combining, when the other users are treated as noise. In con-junction with interleaver-division multiple access, these trellis codes provide a relatively low com-plexity solution for uncoordinated access in the optical multiple-user environment. Also, a union bound technique that predicts the performance of these codes is presented. An implementation on an FPGA is described and results are shown.