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Delivering a content item from a server to a device

  • US 10,135,611 B1
  • Filed: 02/14/2017
  • Issued: 11/20/2018
  • Est. Priority Date: 09/23/2011
  • Status: Active Grant
First Claim
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1. A computer-based method for a server to deliver a content item to a first device and a second device, the computer-based method comprising:

  • storing, in a database of the server, an identifier unique to the first device and an identifier unique to the second device;

    receiving, from the first device, a first request for the content item and a first identifier associated with the first device;

    requesting a first set of encryption keys in response to a first verification that the first identifier matches the identifier unique to the first device stored in the database;

    receiving, from a key management server, the first set of encryption keys in response to the request for the first set of encryption keys;

    receiving a plurality of file segments of the content item;

    associating, in the database of the server, the first set of encryption keys with the content item and the identifier unique to the first device;

    generating a first session-specific playlist including a first plurality of session-specific file segment URLs corresponding to the plurality of file segments, wherein a session-specific file segment URL of the first plurality of session-specific file segment URLs includes a filename of a corresponding file segment of the plurality of file segments appended with a session identification corresponding to a first session;

    generating a first encrypted segment by encrypting a file segment of the plurality of file segments using a first encryption key of the first set of encryption keys;

    receiving, from the second device, a second request for the content item and a second identifier associated with the second device;

    requesting a second set of encryption keys different from the first set of encryption keys in response to a second verification that the second identifier matches the identifier unique to the second device stored in the database;

    receiving, from the key management server, the second set of encryption keys in response to the request for the second set of encryption keys;

    associating, in the database of the server, the second set of encryption keys with the content item and the identifier unique to the second device;

    generating a second session-specific playlist including a second plurality of session-specific file segment URLs corresponding to the plurality of file segments, wherein a session-specific file segment URL of the second plurality of session-specific file segment URLs includes a filename of a corresponding file segment of the plurality of file segments appended with a session identification corresponding to a second session;

    generating a second encrypted segment by encrypting the file segment of the plurality of file segments using a second encryption key of the second set of encryption keys; and

    delivering the first encrypted segment to the first device and the second encrypted segment to the second device.

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