# IBM Integrity Measurement Architecture # config IMA bool "Integrity Measurement Architecture(IMA)" depends on ACPI depends on SECURITY select SECURITYFS select CRYPTO select CRYPTO_HMAC select CRYPTO_MD5 select CRYPTO_SHA1 select TCG_TPM select TCG_TIS help The Trusted Computing Group(TCG) runtime Integrity Measurement Architecture(IMA) maintains a list of hash values of executables and other sensitive system files, as they are read or executed. If an attacker manages to change the contents of an important system file being measured, we can tell. If your system has a TPM chip, then IMA also maintains an aggregate integrity value over this list inside the TPM hardware, so that the TPM can prove to a third party whether or not critical system files have been modified. Read to learn more about IMA. If unsure, say N. config IMA_MEASURE_PCR_IDX int depends on IMA range 8 14 default 10 help IMA_MEASURE_PCR_IDX determines the TPM PCR register index that IMA uses to maintain the integrity aggregate of the measurement list. If unsure, use the default 10. config IMA_AUDIT bool depends on IMA default y help This option adds a kernel parameter 'ima_audit', which allows informational auditing messages to be enabled at boot. If this option is selected, informational integrity auditing messages can be enabled with 'ima_audit=1' on the kernel command line. config IMA_LSM_RULES bool depends on IMA && AUDIT && (SECURITY_SELINUX || SECURITY_SMACK) default y help Disabling this option will disregard LSM based policy rules.