Efficient hardware implementation of PMI+ for low-resource devices in mobile cloud computing

Shaohua Tang, Bo Lv, Guomin Chen, Zhiniang Peng, Adama Diene, Xiaofeng Chen

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Abstract With rapid development of cloud computing, security issues have gained more and more attention, especially in mobile cloud computing environment. Smart phones and other mobile devices provide a lot of convenience to us, but due to its intrinsic low-resource limitation, it also causes many security problems. In this paper, we design a hardware that can efficiently implement PMI+, which is a Multivariate Quadratic (MQ) asymmetric cipher, for low-resource devices in mobile cloud computing. Our main contributions are that, firstly, hardware architectures of encryption and decryption of PMI+ are developed, and descriptions of corresponding hardware algorithm are proposed; secondly, basic arithmetic units are implemented with higher efficiency that multiplication, squaring, vector dot product and power operation are implemented in full parallel; and thirdly, optimized implementations for core modules, including optimized large power operation, are achieved. The encryption and decryption hardware of PMI+ is efficiently realized on FPGA by the above optimization and improvement. It is verified by experiments that the designed hardware can complete an encryption operation within 497 clock cycles, and the clock frequency can be up to 145.60 MHz, and the designed hardware can complete a decryption operation within 438 clock cycles wherein the clock frequency can be up to 132.21 MHz. Our experiment results also confirm that our design can be deployed in low-resource devices as thin client of mobile cloud computing.

Original languageEnglish
Article number2670
Pages (from-to)116-124
Number of pages9
JournalFuture Generation Computer Systems
Publication statusPublished - Jul 29 2015


  • Hardware implementation
  • Low-resource devices
  • Mobile cloud computing
  • Multivariate Quadratic (MQ) public key algorithm
  • Optimized large power operation
  • PMI+ encryption and decryption

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications


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