secure file deletion造句

While at PGP, he focused on the engineering of cryptographic products on the OS X platform including the cross platform core crypto library, secure file deletion, virtual disk client, network kernel engine redirection module.
Other notable features of the program includes archive conversion, file splitting and joining, secure file deletion, byte-to-byte file comparison, archive encryption, checksum / hash files, find duplicate files, batch renaming, system benchmarking, random passwords / keyfiles generation, view image thumbnails ( multi threaded on the fly thumbnails generation without saving image cache to the host machine ), and integration in the Windows Explorer context menu.
It's difficult to find secure file deletion in a sentence. 用secure file deletion造句挺难的