--- a/include/image.mk
+++ b/include/image.mk
@@ -227,8 +227,7 @@ $(eval $(foreach S,$(NAND_BLOCKSIZE),$(c
 define Image/mkfs/squashfs-common
 	$(STAGING_DIR_HOST)/bin/mksquashfs4 $(call mkfs_target_dir,$(1)) $@ \
 		-nopad -noappend -root-owned \
-		-comp $(SQUASHFSCOMP) $(SQUASHFSOPT) \
-		-processors 1
+		-comp $(SQUASHFSCOMP) $(SQUASHFSOPT)
 endef
 
 ifeq ($(CONFIG_TARGET_ROOTFS_SECURITY_LABELS),y)
@@ -441,6 +440,9 @@ else
   DEVICE_CHECK_PROFILE = $(CONFIG_TARGET_$(if $(CONFIG_TARGET_MULTI_PROFILE),DEVICE_)$(call target_conf,$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET)))_$(1))
 endif
 
+DEVICE_CHECK_FIT_KEY = $(if $(wildcard $(FIT_KEY_DIR)/$(FIT_KEY_NAME).key),install-images,install-disabled)
+DEVICE_CHECK_FIT_DIR = $(if $(FIT_KEY_DIR),$(DEVICE_CHECK_FIT_KEY),install-images)
+
 DEVICE_EXTRA_PACKAGES = $(call qstrip,$(CONFIG_TARGET_DEVICE_PACKAGES_$(call target_conf,$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET)))_DEVICE_$(1)))
 
 define merge_packages
@@ -463,7 +465,7 @@ endef
 define Device/Check
   $(Device/Check/Common)
   KDIR_KERNEL_IMAGE := $(KDIR)/$(1)$$(KERNEL_SUFFIX)
-  _TARGET := $$(if $$(_PROFILE_SET),install-images,install-disabled)
+  _TARGET := $$(if $$(_PROFILE_SET),$$(DEVICE_CHECK_FIT_DIR),install-disabled)
   ifndef IB
     _COMPILE_TARGET := $$(if $(CONFIG_IB)$$(_PROFILE_SET),compile,compile-disabled)
   endif
--- a/scripts/mkits.sh
+++ b/scripts/mkits.sh
@@ -17,6 +17,7 @@
 usage() {
 	printf "Usage: %s -A arch -C comp -a addr -e entry" "$(basename "$0")"
 	printf " -v version -k kernel [-D name -n address -d dtb] -o its_file"
+	printf " [-s script] [-S key_name_hint] [-r ar_ver]"
 
 	printf "\n\t-A ==> set architecture to 'arch'"
 	printf "\n\t-C ==> set compression type 'comp'"
@@ -28,13 +29,16 @@ usage() {
 	printf "\n\t-D ==> human friendly Device Tree Blob 'name'"
 	printf "\n\t-n ==> fdt unit-address 'address'"
 	printf "\n\t-d ==> include Device Tree Blob 'dtb'"
-	printf "\n\t-o ==> create output file 'its_file'\n"
+	printf "\n\t-o ==> create output file 'its_file'"
+	printf "\n\t-s ==> include u-boot script 'script'"
+	printf "\n\t-S ==> add signature at configurations and assign its key_name_hint by 'key_name_hint'"
+	printf "\n\t-r ==> set anti-rollback version to 'fw_ar_ver' (dec)\n"
 	exit 1
 }
 
 FDTNUM=1
 
-while getopts ":A:a:c:C:D:d:e:k:n:o:v:" OPTION
+while getopts ":A:a:c:C:D:d:e:k:n:o:v:s:S:r:" OPTION
 do
 	case $OPTION in
 		A ) ARCH=$OPTARG;;
@@ -48,6 +52,9 @@ do
 		n ) FDTNUM=$OPTARG;;
 		o ) OUTPUT=$OPTARG;;
 		v ) VERSION=$OPTARG;;
+		s ) UBOOT_SCRIPT=$OPTARG;;
+		S ) KEY_NAME_HINT=$OPTARG;;
+		r ) AR_VER=$OPTARG;;
 		* ) echo "Invalid option passed to '$0' (options:$*)"
 		usage;;
 	esac
@@ -132,6 +139,56 @@ if [ -n "${AR_VER}" ]; then
 "
 fi
 
+# Conditionally create script information
+if [ -n "${UBOOT_SCRIPT}" ]; then
+	SCRIPT="\
+		script@1 {
+			description = \"U-Boot Script\";
+			data = /incbin/(\"${UBOOT_SCRIPT}\");
+			type = \"script\";
+			arch = \"${ARCH}\";
+			os = \"linux\";
+			load = <0>;
+			entry = <0>;
+			compression = \"none\";
+			hash@1 {
+				algo = \"crc32\";
+			};
+			hash@2 {
+				algo = \"sha1\";
+			};
+		};\
+"
+	LOADABLES="\
+			loadables = \"script@1\";\
+"
+	SIGN_IMAGES="\
+				sign-images = \"fdt\", \"kernel\", \"loadables\";\
+"
+else
+	SIGN_IMAGES="\
+				sign-images = \"fdt\", \"kernel\";\
+"
+fi
+
+# Conditionally create signature information
+if [ -n "${KEY_NAME_HINT}" ]; then
+	SIGNATURE="\
+			signature {
+				algo = \"sha1,rsa2048\";
+				key-name-hint = \"${KEY_NAME_HINT}\";
+${SIGN_IMAGES}
+			};\
+"
+fi
+
+# Conditionally create anti-rollback version information
+if [ -n "${AR_VER}" ]; then
+	FW_AR_VER="\
+			fw_ar_ver = <${AR_VER}>;\
+"
+fi
+
 # Create a default, fully populated DTS file
 DATA="/dts-v1/;
 
@@ -157,14 +214,18 @@ DATA="/dts-v1/;
 			};
 		};
 ${FDT_NODE}
+${SCRIPT}
 	};
 
 	configurations {
 		default = \"${CONFIG}\";
 		${CONFIG} {
 			description = \"OpenWrt\";
+${FW_AR_VER}
+${LOADABLES}
 			kernel = \"kernel@1\";
 			${FDT_PROP}
+${SIGNATURE}
 		};
 	};
 };"
--- a/target/linux/mediatek/image/Makefile
+++ b/target/linux/mediatek/image/Makefile
@@ -16,6 +16,55 @@ define Build/sysupgrade-emmc
 		$(IMAGE_ROOTFS)
 endef
 
+# build squashfs-hashed
+define Build/squashfs-hashed
+	$(CP) $(ROOTFS/$(FILESYSTEMS)/$(DEVICE_NAME)) $(ROOTFS/$(FILESYSTEMS)/$(DEVICE_NAME))-hashed
+	$(TOPDIR)/scripts/make-squashfs-hashed.sh \
+		$(ROOTFS/$(FILESYSTEMS)/$(DEVICE_NAME))-hashed \
+		$(STAGING_DIR_HOST) \
+		$(TOPDIR) \
+		$(ROOTFS/$(FILESYSTEMS)/$(DEVICE_NAME))-hashed-summary
+	cat $(ROOTFS/$(FILESYSTEMS)/$(DEVICE_NAME))-hashed-summary | \
+		$(TOPDIR)/scripts/prepare-dm-verity-uboot-script.sh \
+		"$(HASHED_BOOT_DEVICE)" \
+		"$(BASIC_KERNEL_CMDLINE)" \
+		> $(KDIR)/$(DEVICE_NAME)-u-boot-script
+endef
+
+# build fw-ar-ver
+get_fw_ar_ver = \
+  $(if $(wildcard $(2)),$(shell rm -rf $(2))) \
+  $(if $(wildcard $(1)),$(info $(shell $(STAGING_DIR_HOST)/bin/ar-tool fw_ar_table create_ar_conf $(1) $(2)))) \
+  $(if $(wildcard $(2)),$(eval include $(2))) \
+  $(if $(FW_AR_VER),$(info FW_AR_VER = $(FW_AR_VER)))
+
+define Build/fw-ar-ver
+	$(call get_fw_ar_ver,$(ANTI_ROLLBACK_TABLE),$(AUTO_AR_CONF))
+endef
+
+# build signed fit
+define Build/fit-sign
+	$(TOPDIR)/scripts/mkits.sh \
+		-D $(DEVICE_NAME) \
+		-o $@.its \
+		-k $@ \
+		$(if $(word 2,$(1)),-d $(word 2,$(1))) -C $(word 1,$(1)) \
+		-a $(KERNEL_LOADADDR) \
+		-e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
+		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config-1") \
+		-A $(LINUX_KARCH) \
+		-v $(LINUX_VERSION) \
+		-s $(KDIR)/$(DEVICE_NAME)-u-boot-script \
+		$(if $(FIT_KEY_NAME),-S $(FIT_KEY_NAME)) \
+		$(if $(FW_AR_VER),-r $(FW_AR_VER))
+	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage \
+		-f $@.its \
+		$(if $(FIT_KEY_DIR),-k $(FIT_KEY_DIR)) \
+		-r \
+		$@.new
+	@mv $@.new $@
+endef
+
 # default all platform image(fit) build 
 define Device/Default
   PROFILES = Default $$(DEVICE_NAME)
@@ -29,6 +78,8 @@ define Device/Default
   IMAGES := sysupgrade.bin
   IMAGE/sysupgrade.bin := append-kernel | pad-to 128k | append-rootfs | \
 	pad-rootfs | append-metadata
+  FIT_KEY_DIR :=
+  FIT_KEY_NAME :=
 endef
 
 include $(SUBTARGET).mk