Dynamic encryption and decryption of a stream of data

A system for protecting a stream of data comprising:

• an encryption unit and a decryption unit, the encryption unit encrypting the stream of data for transfer to the decryption unit;
• means for dynamically varying said encrypting of said stream of data by said encryption unit over multiple portions of the stream of data by dynamically changing multiple encryption parameters employed by each portion of the stream of data and signaling said dynamic change in encryption parameters employed by each portion of the stream of data to said decryption unit, said means for dynamically varying being responsive to occurrence of a predefined condition in said stream of data;
• wherein said multiple encryption parameters comprise at least two of an encryption key, an encryption granularity, an encryption density scale, an encryption density, an encryption delay, an encryption key update variable, and an encryption key update data trigger;
• and
• wherein said decryption unit decrypts said encrypted data, said decrypting accounting for said dynamic varying of said encrypting by said encryption unit using said dynamically changed, multiple encryption parameters.

A system for protecting a stream of data to be transferred between a sender and a receiver, said system comprising:

• an encryption unit disposed at said sender for encrypting the stream of data prior to transfer to said receiver, said encryption unit being adapted to dynamically vary encrypting of the stream of data over multiple portions of the stream of data by dynamically changing multiple encryption parameters employed for each portion of the stream of data based on an occurrence of a predefined condition in said data stream and signaling said change in encryption parameters employed for each portion of the stream of data to said receiver;
• wherein said multiple encryption parameters comprise at least two of an encryption key, an encryption granularity, an encryption density scale, an encryption density, an encryption delay, an encryption key update variable, and an encryption key update data trigger;
• and
• a decryption unit disposed at said receiver for decrypting said encrypted data, said decryption unit being adapted to receive said changed encryption parameters to account for said dynamic varying of said encrypting by said encryption unit using said changed encryption parameters.

At least one program storage device readable by a machine, tangibly embodying at least one program of instructions executable by the machine to perform a method for protecting a stream of data to be transferred between an encryption unit and a decryption unit, comprising;

• encrypting the stream of data at said encryption unit for transfer thereof to said decryption unit;
• dynamically varying said encrypting of said stream of data at said encryption unit over multiple portions of the stream of data by dynamically changing multiple encryption parameters employed for each portion of the stream of data and signaling said change in encryption parameters to said decryption unit, wherein said dynamically varying of said multiple encryption parameters employed for each portion of the stream of data is responsive to occurrence of a predefined condition in said stream of data;
• wherein said multiple encryption parameters comprise at least two of an encryption key, an encryption granularity, an encryption density scale, an encryption density, an encryption delay, an encryption key update variable, and an encryption key update data trigger;
• and
• decrypting said encrypted data at the decryption unit, said decrypting accounting for said dynamic varying of said encrypting by said encryption unit using said dynamically changed, multiple encryption parameters.