Data encryption and decryption

A method comprising steps of:

• receiving packets of a streaming video from a video source;
• encrypting a first packet of the streaming video with an encryption key and transmitting the encrypted first packet over a communication network to a client device;
• encrypting the first packet with a reference key and designating the first packet as a reference packet;
• selecting a number of packets of the streaming video that follow the first packet;
• and
• for each respective one of the selected packets:
• performing an exclusive or (XOR) operation of the respective selected packet with the reference packet;
• rearranging result values of the XOR operation in accordance with a shuffle key;
• dividing the rearranged values into segments of a predetermined length;
• assigning each of the segments to an even list or an odd list based on a value of each segment;
• combining the even and odd list segments to form a respective encrypted packet;
• designating the respective encrypted packet as a non-reference packet;
• and
• transmitting the respective encrypted non-reference packet over the communication network to the client device.

A client device comprising:

• a communication interface;
• and
• a processor coupled to the communication interface, wherein the processor is configured to control operations of the client device to cause the client device to implement functions, including functions to:
• receive packets of a streaming video from a video source, wherein the received packets are encrypted by a networking device prior to being transmitted to the client device;
• receive an encryption key, a reference key and a shuffle key for the received packets;
• determine, for each respective one of the received packets, if the respective packet is a reference packet or one of one or more non-reference packets;
• if the respective packet is the reference packet:
• decrypt the respective packet with the encryption key to obtain an original packet corresponding to the respective packet, and
• encrypt the respective packet with the reference key to generate a reference packet;
• if the respective packet is one of the one or more non-reference packets:
• rearrange values of the respective packet in accordance with the shuffle key;
• divide the rearranged values into segments of a predetermined length;
• assign each of the segments to an even list or an odd list based on a value of each segment;
• combine the even and odd list segments to form a byte sequence for the respective packet;
• and
• perform an exclusive or (XOR) operation of the byte sequence for the respective packet with the reference packet to obtain an original packet corresponding to the respective packet.