Dynamically configurable interleaver scheme using at least one dynamically changeable interleaving parameter

1. A method for encrypting and decrypting an original data stream comprising:

(A) transmitting a copy of a key to an interleaver and to a de-interleaver; said interleaver placed at a transmitting end of a communication channel; said de-interleaver placed at a receiving end of said communication channel; wherein said key includes a key-algorithm, said key-algorithm is configured to describe an evolution in time of at least one interleaving parameter; said at least one interleaving parameter being dynamically changed during data transmission through said communication channel according to said key-algorithm; wherein said at least one dynamically changeable interleaving parameter is selected from the group consisting of: {a variable branch number; and a variable register depth}; wherein said variable branch number is a first interleaving parameter being dynamically changed during data transmission through said communication channel; and wherein said variable register depth is a second interleaving parameter being dynamically changed during data transmission through said communication channel;

(B) interleaving said original data stream by using said interleaver having said at least one dynamically changeable interleaving parameter; wherein said interleaved data stream propagates through said communication channel; and wherein said interleaver compensates for a change in latency caused by said at least one dynamically changeable interleaving parameter;

and

(C) recovering said original data stream from said interleaved data stream propagated through said communication channel by using said de-interleaver adapted to communicate with said communication channel; wherein said de-interleaver includes said at least one said dynamically changeable interleaving parameter; and wherein said de-interleaver compensates for a change in latency caused by said at least one dynamically changeable interleaving parameter.

2. The method of claim 1 , wherein said step (A) further comprises:

(A1) synchronously changing said at least one dynamically changeable interleaving parameter at both ends of said communication channel according to said key-algorithm included in said key.

3. The method of claim 2 , wherein said step (A1) further comprises:

(A1, 1) using a Pseudo-Random Binary sequence (PRBS) generator to generate a PRBS key.

4. The method of claim 1 , wherein said step (B) further comprises:

(B1) using an anticipator block in said interleaver to compensate for latency decrease caused by at least one dynamically changeable interleaving parameter change in said at least one interleaving parameter.

5. The method of claim 1 , wherein said step (B) further comprises:

(B2) using a compensator block in said interleaver to compensate for latency increase caused by at least one dynamically changeable interleaving parameter change in said at least one interleaving parameter.

6. The method of claim 1 , wherein said step (C) further comprises:

(C1) using an anticipator block in said de-interleaver to compensate for latency decrease caused by at least one dynamically changeable interleaving parameter change in said at least one interleaving parameter.

7. The method of claim 1 , wherein said step (C) further comprises:

(C2) using a compensator block in said de-interleaver to compensate for latency increase caused by at least one dynamically changeable interleaving parameter change in said at least one interleaving parameter.

8. A method for encrypting and decrypting an original data stream comprising:

(A) transmitting a copy of a key to an interleaver; said interleaver placed at a transmitting end of a communication channel; wherein said key includes a key-algorithm, said key-algorithm is configured to describe an evolution in time of at least one interleaving parameter; said at least one interleaving parameter being dynamically changed during data transmission through said communication channel according to said key-algorithm; wherein said at least one dynamically changeable interleaving parameter is selected from the group consisting of: {a variable branch number; and a variable register depth}; wherein said variable branch number is a first interleaving parameter being dynamically changed during data transmission through said communication channel; and wherein said variable register depth is a second interleaving parameter being dynamically changed during data transmission through said communication channel;

and

(B) interleaving said original data stream by using said interleaver having said at least one dynamically changeable interleaving parameter; wherein said interleaved data stream propagates through said communication channel; and wherein said interleaver compensates for a change in latency caused by said at least one dynamically changeable interleaving parameter;

wherein said original data is recovered from said interleaved data stream propagated through said communication channel by using a de-interleaver adapted to communicate with said communication channel; wherein said de-interleaver includes said at least one said dynamically changeable interleaving parameter; and wherein said de-interleaver compensates for a change in latency caused by said at least one dynamically changeable interleaving parameter.

9. A method for encrypting and decrypting an original data stream comprising:

(A) transmitting a copy of a key to a de-interleaver; said de-interleaver placed at a receiving end of a communication channel; wherein said key includes a key-algorithm, said key-algorithm is configured to describe an evolution in time of at least one interleaving parameter; said at least one interleaving parameter being dynamically changed during data transmission through said communication channel according to said key-algorithm; wherein said at least one dynamically changeable interleaving parameter is selected from the group consisting of: {a variable branch number; and a variable register depth}; wherein said variable branch number is a first interleaving parameter being dynamically changed during data transmission through said communication channel; and wherein said variable register depth is a second interleaving parameter being dynamically changed during data transmission through said communication channel; wherein said original data stream was interleaved by using an interleaver having said at least one dynamically changeable interleaving parameter; wherein said interleaved data stream propagates through said communication channel; and wherein said interleaver compensates for a change in latency caused by said at least one dynamically changeable interleaving parameter;

and

(B) recovering said original data stream from said interleaved data stream propagated through said communication channel by using said de-interleaver adapted to communicate with said communication channel; wherein said de-interleaver includes said at least one said dynamically changeable interleaving parameter; and wherein said de-interleaver compensates for a change in latency caused said by at least one dynamically changeable interleaving parameter.