Help¶

Enabling this configuration omits 75% of the AES tables in ROM or RAM. There is a tradeoff between lookup size and doing more arithmetic operations on the fly, which impacts the performance of the AES operations. MBEDTLS_AES_FEWER_TABLES setting in mbed TLS config file.

Direct dependencies¶

VANILLA_MBEDTLS_AES_C && NRF_SECURITY_ADVANCED && NRF_SECURITY_ANY_BACKEND && NORDIC_SECURITY_BACKEND

(Includes any dependencies from ifs and menus.)

Defaults¶

No defaults. Implicitly defaults to n.

Kconfig definition¶

At <nrfxlib>/nrf_security/Kconfig:1437

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:9 → <BuildDir>/Kconfig/Kconfig.modules:5 → <nrfxlib>/Kconfig.nrfxlib:13

Menu path: (Top) → Modules → Nordic nrfxlib → Nordic Security → Use Nordic provided security backend → Advanced mbed TLS Configuration Settings

config MBEDTLS_AES_FEWER_TABLES
    bool "Use fewer AES tables"
    depends on VANILLA_MBEDTLS_AES_C && NRF_SECURITY_ADVANCED && NRF_SECURITY_ANY_BACKEND && NORDIC_SECURITY_BACKEND
    help
      Enabling this configuration omits 75% of the AES tables in ROM or RAM.
      There is a tradeoff between lookup size and doing more arithmetic
      operations on the fly, which impacts the performance of the AES operations.
      MBEDTLS_AES_FEWER_TABLES setting in mbed TLS config file.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)