| MESSAGELABS Limited Patent applications |
| Patent application number | Title | Published |
|---|
| 20090232413 | Scanning images for pornography - A computer system scans image files for pornographic image content by pre-filtering image files to detect the presence in copyright data fields of stored items of copyright information deemed to indicate that the image file is one of acceptable or unacceptable. On detecting such items of copyright information, a signal is output indicating that the image file does or does not contain pornographic image content without the need to analyse the image content of the image file. | 09-17-2009 |
| 20090123064 | Scanning images for pornography - Heuristic analysis of image is performed to detect pornographic content. Pixels of an image representing a flesh-tone are identified. A heuristic analysis of the image is performed to classify the image as being pornographic or not. The analysis uses measures of a set of predetermined characteristics of the identified pixels as a heuristic to indicate a likelihood that the identified pixels contain pornographic content or not. Particular characteristics used are: the thickness of a region of identified pixels; the area of regions of adjacent identified pixels; the flatness of regions of adjacent identified pixels; the distance of pixels from the centre of the image; the degree of texture of regions adjacent identified pixels; the likelihood of the identified pixels being flesh-tone, and the area of the identified pixels. The heuristic analysis is layered, comprising a plurality of tests, each test using the set of predetermined characteristics with differing degrees of significance attributed to each characteristic. | 05-14-2009 |
| 20090019121 | Message processing - A message processing system | 01-15-2009 |
| 20090013408 | Detection of exploits in files - A scanning system for scanning computer files for exploits uses a database of validation rules, in respect of each of a plurality of file formats comprising data fields having a predetermined structure, the validation rules specifying valid structure and/or content for the data fields of the respective file format. Files are analysed to determine their file format. A validation process is performed comprising parsing the file to determine the structure and content of its data fields and validating the structure and/or content of the data fields of the file against the validation rules stored in the database in respect of the determined file format of the file. A file is determined to contain an exploit in response to the structure and/or content of the data fields of the file failing to be validated. | 01-08-2009 |
| 20090013405 | Heuristic detection of malicious code - Scanning of computer files for malware uses a classifying technique to classify an input file as a clean file or a dirty file. The parameters of the classifying technique are derived to train the classification on a corpus of reference files including clean files known to be free of malware and dirty files known to contain malware. The classification is performed using a representation of the files in a feature space defined by a set of predetermined features for respective file formats, the features being a predetermined value or range of values for one or more data fields of given meanings. The representation of a file is derived by determining the file format, parsing the file on the basis of the structure of data fields in the determined file format to identify the data fields and their meaning, and determining, on the basis of the identified data fields, which of the set of predetermined features are present. | 01-08-2009 |
| 20080209554 | Spam honeypot domain identification - Identification of spam honeypot domains is performed automatically by a system | 08-28-2008 |
