diff --git a/openwrt_patches-21.02/9991-fit-secure-boot-and-anti-rollback-support.patch b/openwrt_patches-21.02/9991-fit-secure-boot-and-anti-rollback-support.patch
new file mode 100644
index 0000000..905e51d
--- /dev/null
+++ b/openwrt_patches-21.02/9991-fit-secure-boot-and-anti-rollback-support.patch
@@ -0,0 +1,117 @@
+diff --git a/scripts/mkits.sh b/scripts/mkits.sh
+index 547a4eb..1075367 100755
+--- 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
+@@ -82,6 +89,56 @@ if [ -n "${DTB}" ]; then
+ 	FDT_PROP="fdt = \"fdt-$FDTNUM\";"
+ 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/;
+ 
+@@ -107,14 +164,18 @@ DATA="/dts-v1/;
+ 			};
+ 		};
+ ${FDT_NODE}
++${SCRIPT}
+ 	};
+ 
+ 	configurations {
+ 		default = \"${CONFIG}\";
+ 		${CONFIG} {
+ 			description = \"OpenWrt\";
++${FW_AR_VER}
++${LOADABLES}
+ 			kernel = \"kernel-1\";
+ 			${FDT_PROP}
++${SIGNATURE}
+ 		};
+ 	};
+ };"