3.2.1.4.2.1.4.6.1 Default Serial Numbers
Generate a number C defined in section 3.2.1.4.2.1.4.6 using any pseudo random number generator.
Construct a serial number that consists of these parts (from low byte to high):
Bytes 0-3: The 4-byte little-endian value of the request ID (the value of the Request_Request_ID column in the Request table generated in section 3.2.1.4.2.1.4.3).
Bytes 4-5: The 2-byte little-endian value of the zero-based index of the last row of the Signing_Cert table.
Bytes 6-9: The value of C generated at step 1.