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Methodology, system and computer readable medium for detecting file encryption

  • US 20040196970A1
  • Filed: 04/01/2003
  • Published: 10/07/2004
  • Est. Priority Date: 04/01/2003
  • Status: Active Grant
First Claim
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1. A computerized method for determining whether a data stream is in a cyphertext format, wherein said data stream is characterized by a plurality of data bytes, each having an associated byte value, said method comprising:

  • performing a statistical analysis of the associated data stream'"'"'s byte values to compute a statistical result having a resultant value indicative of a level of uniformity for a frequency distribution of the byte values in the data stream;

    controlling an output device to display output corresponding to an existence of cyphertext if the resultant value indicates uniformity of the frequency distribution.

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