CPU Jitter RNG Test Interface
modulename: jitterentropy-testing.ko
configname: CONFIG_CRYPTO_JITTERENTROPY_TESTINTERFACE
Linux Kernel Configuration
└─>Cryptographic API
└─>Random number generation
└─>CPU Jitter RNG Test Interface
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
The test interface allows a privileged process to capture
the raw unconditioned high resolution time stamp noise that
is collected by the Jitter RNG for statistical analysis. As
this data is used at the same time to generate random bits,
the Jitter RNG operates in an insecure mode as long as the
recording is enabled. This interface therefore is only
intended for testing purposes and is not suitable for
production systems.
The raw noise data can be obtained using the jent_raw_hires
debugfs file. Using the option
jitterentropy_testing.boot_raw_hires_test=1 the raw noise of
the first 1000 entropy events since boot can be sampled.
If unsure, select N.
the raw unconditioned high resolution time stamp noise that
is collected by the Jitter RNG for statistical analysis. As
this data is used at the same time to generate random bits,
the Jitter RNG operates in an insecure mode as long as the
recording is enabled. This interface therefore is only
intended for testing purposes and is not suitable for
production systems.
The raw noise data can be obtained using the jent_raw_hires
debugfs file. Using the option
jitterentropy_testing.boot_raw_hires_test=1 the raw noise of
the first 1000 entropy events since boot can be sampled.
If unsure, select N.