Selective real-time cryptography in a vehicle communication network

A receiver device configured to receive a first plurality of data blocks, which include encrypted data blocks and unencrypted data blocks, the receiver device comprising:

• a first sequence generator configured to generate a first sequence of bits having a bit pattern that comprises first bit values and second bit values;
• a first parsing processor configured to receive the first plurality of data blocks, receive the first sequence of bits from the first sequence generator, and parse out the encrypted data blocks from the unencrypted data blocks based on the bit pattern,
• wherein the first parsing processor is configured to associate each of the first plurality of data blocks to a different corresponding bit of the first sequence of bits, extract data blocks from the first plurality of data blocks that are associated with the first bit values as the encrypted data blocks to be decrypted by the decryption processor, and extract data blocks from the first plurality of data blocks that are associated with the second bit values as the unencrypted data blocks;
• and
• a decryption processor configured to receive the encrypted data blocks parsed out by the first parsing processor and decrypt the encrypted data blocks to generate further unencrypted data blocks.

A method of transmitting a plurality of data blocks, the method comprising:

• generating, at a sender device, a first sequence of bits having a bit pattern comprising first bit values and second bit values;
• selecting, at the sender device, a first subset of data blocks and a second subset of data blocks from the plurality of data blocks based on the bit pattern, wherein selecting the first subset of data blocks and the second subset of data blocks includes associating each of the plurality of data blocks to a different corresponding bit of the first sequence of bits, extract data blocks from the plurality of data blocks that are associated with the first bit values to be used as the selected first subset of data blocks, and extract data blocks from the plurality of data blocks that are associated with the second bit values to be used as the selected second subset of data blocks;
• providing the selected first subset of data blocks to a first signal path of the sender device;
• providing the selected second subset of data blocks to a second signal path of the sender device, the second signal path being coupled to an output terminal of the of the sender device;
• encrypting, at the sender device, the selected first subset of data blocks to generate encrypted data blocks and outputting the encrypted data blocks to the output terminal,
• wherein the second signal path bypasses the encryption such that the selected second subset of data blocks remain unencrypted data blocks;
• and
• transmitting the encrypted data blocks and the unencrypted data blocks from the sender device at the output terminal.