config BR2_PACKAGE_FSCRYPTCTL bool "fscryptctl" help fscryptctl is a low-level tool written in C that handles raw keys and manages policies for Linux filesystem encryption. Notice: Fscrypt support on EXT4 requires a kernel with CONFIG_EXT4_ENCRYPTION=y and a file system with the encryption option and block size equal to CPU page size (BR2_TARGET_ROOTFS_EXT2_MKFS_OPTIONS="-O encrypt -b 4096") https://github.com/google/fscryptctl