diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index 0e32c4688..2735c9c36 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -183,6 +183,15 @@ config BOOT_ED25519_MBEDTLS
 	select BOOT_USE_MBEDTLS
 	select MBEDTLS
 endchoice
+
+config BOOT_KEY_IMPORT_BYPASS_ASN
+	bool "Directly access key value without ASN.1 parsing"
+	help
+	  Originally public keys compiled into MCUboot are
+	  stored in ASN.1 encoded format, Enabling the options
+	  bypasses the ASN.1 decoding and directly accesss the key
+	  in ASN.1 bitstream; this reduces MCUboot code by removing
+	  the ASN.1 processing.
 endif
 
 endchoice