Abstract: A method for revealing a type of data is provided herein. The method is comprising the following steps (i) receiving at least one training data set of objects to create a signature for that data type; (ii) creating the signature, by: (a) scanning all objects in each training data set, to create a list of unique N-Grams of any size and their statistics; and (b) adding each N-Gram in the list in case it appears in a minimum of predefined threshold objects to a repository; (iii) receiving data of unknown type for examination; (iv) scanning said received data of unknown type to score each N-Gram in the signature of each object type when it is found in the scanned data; and (v) determining the type of the unknown type data according to the signature of the object type that accumulated highest score by the N-Grams of the signature.