Patent ID: 9239923
Filing Date: 2016-01-19
CPC Classification: G06F,H04L

Claim Text:
1. A method of protection of a computer system, the method comprising: (a) providing the computer system with an application for processing incoming files to the computer system of a predefined Headerless format that include a Characteristic pattern of bytes, (b) computing apparatus external to the computer system ascertaining a Characteristic pattern of bytes of an incoming file to the computing apparatus from bytes of the file, (c) the computing apparatus performing a content check on the incoming file to the computing apparatus to determine whether or not the file has contents that are malformed and therefore potentially damaging when interpreted in accordance with a file format specification associated with the ascertained Characteristic pattern of bytes, (d) the computing apparatus moving the file to the computer system if the file is not determined to have malformed content, (e) the computer system checking the incoming file to the computer system and having Headerless format by comparing bytes of the file with the Characteristic pattern of bytes of the predefined Headerless format, and (f) the computer system disallowing processing by the application if the bytes compared in step (e) with the Characteristic pattern of bytes of the predefined Headerless format do not correspond with that Characteristic pattern.