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Dynamic, selective obfuscation of information for multi-party transmission

  • US 8,824,684 B2
  • Filed: 12/08/2007
  • Issued: 09/02/2014
  • Est. Priority Date: 12/08/2007
  • Status: Active Grant
First Claim
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1. A computer-implemented method of selectively obfuscating information in a multi-party voice communication, comprising using a processor of a computer for:

  • receiving a signal, during an ongoing multi-party voice communication, from a device with which a selected one of a plurality of participants is participating in the multi-party voice communication, the signal indicating that a next utterance from the selected participant is to be transmitted as an obfuscated segment in the ongoing multi-party voice communication; and

    responding to the signal, during the ongoing multi-party voice communication, comprising;

    determining, from among the plurality of participants, a subset of the participants selected to perceive the obfuscated segment;

    using a participant-specific encryption key, for each of the subset of participants, to encrypt a group-specific decryption key;

    creating, from the encrypted group-specific decryption key for each of the subset of participants, a descriptor structure in which the encrypted group-specific decryption key for each of the participants in the subset is identified with a corresponding identifier of the participant;

    obfuscating the next utterance as an obfuscated segment by encrypting the next utterance using a group-specific encryption key that corresponds to the group-specific decryption key; and

    transmitting the obfuscated segment, and the descriptor structure, to each of the plurality of participants in the multi-party voice communication, thereby enabling each of the participants in the subset to decrypt and perceive the obfuscated segment while preventing remaining ones of the participants of the multi-party voice communication from decrypting and perceiving the obfuscated segment.

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