Title page for ETD etd-10182007-182636

Type of Document Master's Thesis
Author Satti, Maruti Venkat Kartik
URN etd-10182007-182636
Title Quasi Group Based Crypto-System
Degree Master of Science in Electrical Engineering (M.S.E.E.)
Department Electrical & Computer Engineering
Advisory Committee
Advisor Name Title
Subhash Kak Committee Chair
Hsiao-Chun Wu Committee Member
Xue-Bin Liang Committee Member
  • latin square
  • cryptography
  • isotopes
  • decryption
  • encryption
  • Subhash kak
  • Maruti Satti
  • Markovski
  • Gligorovski
  • MIQE
  • Multi level encryption
  • Autocorrelation plot
  • QVS
  • Voice Scrambling
  • Maximising entropy
  • pre processor
  • post processor
  • Randomisation of data
  • secret ptortocol
  • Initial Criteria
  • application in cellular networks
  • Quasigroup encryptor
  • Quasigroup decryptor
  • Security analysis
  • security threat
Date of Defense 2007-10-28
Availability unrestricted
For electronic commerce and other applications it is required to encrypt data that is transmitted over an unsecured channel. The data is encrypted/randomized using a key. Algorithms such as DES and ECC randomize the data such that un-authorized user cannot decrypt it .This thesis presents a practical implementation of a quasi group based multilevel, indexed scrambling transformation for use in signal encryption. Results of experiments with text and speech scrambling are presented. It is shown that the quasi group transformation maximizes the entropy at the output, which is desirable for a good system. This system provides extremely large group of keys that ensures enhanced security. It can work in either the chain mode or the block mode. Block mode is more tolerant to errors compared to the chain mode.
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