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Methods and apparatus for multi-level dynamic security system

  • US 20040223615A1
  • Filed: 04/09/2004
  • Published: 11/11/2004
  • Est. Priority Date: 04/09/2003
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • converting original data into a plurality of sub-bands using wavelet decomposition;

    encrypting at least one of the sub-bands using a key to produce encrypted sub-band data; and

    transmitting the encrypted sub-band data to a recipient separately from the other sub-bands.

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