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BROADCAST DEDUPLICATION FOR SATELLITE BROADBAND

  • US 20140040616A1
  • Filed: 08/03/2012
  • Published: 02/06/2014
  • Est. Priority Date: 08/03/2012
  • Status: Active Grant
First Claim
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1. A computer-implemented method, comprising:

  • receiving, by a headend gateway, a first data stream to forward to a first client device of a plurality of client devices;

    determining that a data block in the first data stream is not known to be stored by the first client device;

    generating a block-encryption key for the data block based on a base key for the first client device;

    generating an encrypted data block by encrypting the data block using the block-encryption key;

    generating a second data stream for the first client device, wherein the second data stream includes an identifier to the data block in place of the encrypted data block;

    sending the second data stream to at least the first client device;

    generating a block-decryption key for the encrypted data block, which involves deriving the block-decryption key from the base key for the first client device;

    storing the encrypted data block along with the block-decryption key; and

    responsive to determining that a second computing device needs to decrypt the encrypted data block, sending the block-decryption key to the second client device so that the block-decryption key is encrypted using a base key assigned to the second client device.

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