Bitmap of pseudo-random sources for entropy collection as follows: Bits 0-15 are software-derived sources of entropy. Not all software sources may be implemented in all configurations. Bits 16-32 are hardware-provided "pure" sources. Not all hardware sources are available on all platforms or virtual machines. Bit 0: - Cached data loaded at boot Bit 1: - Device attachment Bit 2: - Per-CPU counters Bit 3: - Lock manager Bit 4: - Cluster sources Bit 5: - Reserved for future use Bit 6: - Network packets Bit 7: - Interrupts Bit 8: - Software interrupts Bit 9: - File system access time Bit 10: - Non-paged pool deallocation Bit 11-15: - Reserved for future use Bit 16: - RDRAND instruction Bit 17: - VirtIO Random driver (requires host and guest support) Bit 18-31: - Reserved for future use The default value is -1, enabling all available sources. VSI strongly recommends leaving all sources enabled unless there is a specific need to disable a particular source. RANDOM_SOURCES is a DYNAMIC parameter.