Secure information distribution system utilizing information segment scrambling
First Claim
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1. A method for securing an information stream comprising a sequence of image frames, said method comprising the steps of:
- segmenting said information stream into a plurality of information stream segments having a first segment sequence, each of said Information stream segments comprising a plurality of image frames;
compressing said image frames after said segmenting step by employing prediction-based compression;
re-sequencing said information stream segments to produce a re-sequenced information stream having a second segment sequence, said first segment sequence being related to said second segment sequence by an index; and
encrypting said re-sequenced information stream and said index.
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Abstract
A method and apparatus for securing and, optionally, distributing an information stream by divided the information stream into a collection of segments and compressing the segments, rearranging the order of the segments and encrypting the segments.
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Citations
26 Claims
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1. A method for securing an information stream comprising a sequence of image frames, said method comprising the steps of:
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segmenting said information stream into a plurality of information stream segments having a first segment sequence, each of said Information stream segments comprising a plurality of image frames; compressing said image frames after said segmenting step by employing prediction-based compression; re-sequencing said information stream segments to produce a re-sequenced information stream having a second segment sequence, said first segment sequence being related to said second segment sequence by an index; and encrypting said re-sequenced information stream and said index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for recovering an information stream having a first segment sequence from an encrypted re-sequenced information stream having a second segment sequence, said method comprising the steps of:
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recovering an index relating said second segment sequence to said first segment sequence; decrypting said encrypted information segments to form respective decrypted information segments; re-sequencing, using said recovered index, said decrypted information segments to form an information stream comprising a plurality of image segments arranged according to said first segment sequence; and decompressing after said re-sequencing step a plurality of image frames forming each of said information stream segments by employing prediction-based decompression. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An apparatus comprising:
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a segmentation module, for segmenting an information stream into a plurality of information stream segments, said information stream segments arranged according to a first segment sequence, each of said information stream segments comprising a plurality of image frames; a compression module, for compressing said image frames after said segmenting step by employing prediction-based compression; a re-sequencing module, for re-arranging according to a second segment sequence, said information stream segments including said compressed image frames, said first segment sequence being related to said second segment sequence by an index; and an encryption module, for encrypting said re-sequenced information stream segments and said index.
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Specification