Communication device for providing security in a group communication network

A computer-readable medium embodying computer codes for implementing a method for synchronizing encryption and decryption of a data frame in a communication network, the method comprising:

• encrypting a first data frame based on a first unique code in a first communication device, said first unique code being derived from a first sequential code;
• encapsulating said first encrypted data frame in a first transport frame, said first transport frame comprising a first portion and a second portion of said first sequential code;
• encrypting a second data frame based on a second unique code in the first communication device, said second unique code being derived from a second sequential code;
• encapsulating said second encrypted data frame in a second transport frame, said second transport frame comprising a first portion and a second portion of said second sequential code;
• and
• transmitting said first transport frame and said second transport frame to a second communication device,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

An apparatus for synchronizing encryption and decryption of a data frame in a communication network, comprising:

• means for encrypting a first data frame based on a first unique code in a first communication device, said first unique code being derived from a first sequential code;
• means for encapsulating said first encrypted data frame in a first transport frame, said first transport frame comprising a first portion and a second portion of said first sequential code;
• means for encrypting a second data frame based on a second unique code in the first communication device, said second unique code being derived from a second sequential code;
• means for encapsulating said second encrypted data frame in a second transport frame, said second transport frame comprising a first portion and a second portion of said second sequential code;
• and
• means for transmitting said first transport frame and said second transport frame to a second communication device,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

An apparatus, comprising:

• a receiver;
• a transmitter;
• and
• a processor communicatively coupled to the receiver and the transmitter, the processor being capable of implementing a method for synchronizing encryption and decryption of a data frame in a communication network;
• the method comprising:
• encrypting a first data frame based on a first unique code in a first communication device, said first unique code being derived from a first sequential code;
• encapsulating said first encrypted data frame in a first transport frame, said first transport frame comprising a first portion and a second portion of said first sequential code;
• encrypting a second data frame based on a second unique code in the first communication device, said second unique code being derived from a second sequential code;
• encapsulating said second encrypted data frame in a second transport frame, said second transport frame comprising a first portion and a second portion of said second sequential code;
• and
• transmitting said first transport frame and said second transport frame to a second communication device,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

A method for synchronizing encryption and decryption of a data frame in a communication network, the method comprising:

• receiving a first transport frame at a communication device within the communication network, said first transport frame comprising a first encrypted data payload, a first portion of a first sequential code, and a second portion of said first sequential code;
• receiving a second transport frame, said second transport frame comprising a second encrypted data payload, a first portion of a second sequential code, and a second portion of said second sequential code;
• and
• determining said second sequential code using said first portion of said second sequential code, said second portion of said second sequential code, and said second portion of said first sequential code,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

A computer-readable storage medium embodying computer codes for implementing a method for synchronizing encryption and decryption of a data frame in a communication network, the method comprising:

• receiving a first transport frame, said first transport frame comprising a first encrypted data payload, a first portion of a first sequential code, and a second portion of said first sequential code;
• receiving a second transport frame, said second transport frame comprising a second encrypted data payload, a first portion of a second sequential code, and a second portion of said second sequential code;
• and
• determining said second sequential code using said first portion of said second sequential code, said second portion of said second sequential code, and said second portion of said first sequential code,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

An apparatus for synchronizing encryption and decryption of a data frame in a communication network, comprising:

• means for receiving a first transport frame, said first transport frame comprising a first encrypted data payload, a first portion of a first sequential code, and a second portion of said first sequential code;
• means for receiving a second transport frame, said second transport frame comprising a second encrypted data payload, a first portion of a second sequential code, and a second portion of said second sequential code;
• and
• means for determining said second sequential code using said first portion of said second sequential code, said second portion of said second sequential code, and said second portion of said first sequential code,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.

An apparatus, comprising:

• a receiver;
• a transmitter;
• and
• a processor communicatively coupled to the receiver and the transmitter, the processor being capable of implementing a method for synchronizing encryption and decryption of a data frame in a communication network, the method comprising:
• receiving a first transport frame, said first transport frame comprising a first encrypted data payload, a first portion of a first sequential code, and a second portion of said first sequential code;
• receiving a second transport frame, said second transport frame comprising a second encrypted data payload, a first portion of a second sequential code, and a second portion of said second sequential code;
• and
• determining said second sequential code using said first portion of said second sequential code, said second portion of said second sequential code, and said second portion of said first sequential code,
• wherein said first portion of said first sequential code and said first portion of said second sequential code identify the same relative portions of said first and second sequential codes, and said second portion of said second sequential code represents a successive relative portion with respect to said second portion of said first sequential code.