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No More Post Factum Control Over File System Operations

London, UK – October 23, 2008 – EldoS announces today the release of the new special component giving software developers functions to intercept any file system operation before it is executed. CallbackFilter component enables fast implementation of secure flexible file management solutions for numerous data monitoring and protection applications. Experienced software developers and novices will benefit from implementing in their applications full timely control over files system calls execution, modification, substitution or even cancellation, regardless of intrinsic Windows limitations.

“As a company providing security solutions and kernel-mode drivers for software developers we are getting many requests to create new products covering their actual needs. The requests come from people who need to implement Continuous Data Protection (CDP) technology which tracks and regulates file updates or needs to copy files on-the-fly. From people who need to develop audit applications tracking access to certain files. From people needing data protection applications which encrypt files and decrypt them on demand when access is granted. From people needing application firewalls, which give file access rights only to predefined applications. We designed CallbackFilter as a response to these and similar requests. With CallbackFilter your application is really pro-active when it comes to control of file and other similar operations.”, -- says Eugene Mayevski, EldoS CTO.

An attempt to implement solutions, controlling all aspects of operations on files and folders, faces serious limitations imposed by Windows operating system. You can only control changes to files status periodically, after file system operation has been already completed. There is no easy way to intercept or change operation parameters before it is executed or to take any actions before execution completes. Such post factum control is mostly inefficient and unacceptable. To overcome this, the solution must act on the file system level. CallbackFilter includes kernel-mode driver acting as a layer between file system and logical disk. Thus, CallbackFilter provides a legitimate and the highly efficient way to perform such operations. Only five lines of code need to be added to your application in order to implement some of functionalities.

CallbackFilter makes possible selective operations on files and folders based on file attributes, location, name, or name mask. Your software utilizing CallbackFilter can intercept any file system operation request before it is executed, examine its parameters, identify application which sent this request to operating system, and, finally, take required actions. Your application will be able to analyze security context and react before malware or penetrator harms the system. Your software will be able to change, modify, substitute any parameters passed in the request, or even cancel its execution, declining unwanted application access to files. Moreover, you are empowered to implement your own file system operations manager capable of creation, renaming, changing or deleting file or folder in a special way; encrypting, decrypting by custom cryptoalgorithm; backing files up before writing or removal. Addition of capability to execute system calls and then take additional necessary actions, or vice versa, is also a straightforward task. This brief description gives only a short glance at all possible applications of CallbackFilter.

CallbackFilter is the part of product line-up including Callback File System for remote data representation as local files and folders, and CallbackDisk for creation of custom virtual disks. Additional information and free trial download can be found on EldoS Corporation web site (http://www.eldos.com).

About EldoS Corporation

EldoS Corporation focuses on developing security, communication and driver-based software solutions. The software offered by EldoS Corporation is used in over 70 countries on 5 continents by a number of small to large-scale companies and organizations, including financial institutes and military.

Key product families include:

  • SecureBlackbox – software component suite for data security and encryption
  • Callback File System – software component for representing remote data as local files and folders
  • Solid File System – advanced file system for secure documents and files storage development
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    Postal address: EldoS Corporation, 2nd Floor, 145-157 St. John Street, London, EC1V 4PY, United Kingdom

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As of July 15, 2016 EldoS business operates as a division of /n software, inc. For more information, please read the announcement.

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