This article has been written by LogicNP Software and provides useful information about the CryptoLicensing Product - a popular licensing and copy-protection scheme from LogicNP Software - uses the latest military strength, state-of-the-art cryptographic technology to generate secure and unbreakable license codes to ensure that your software and intellectual property is protected. Cryptographic licenses are unbreakable even when using brute force computing power. Furthermore, since the licenses can only be generated using the private key (which only you possess), this means that it is impossible for a hacker to develop a 'keygen' (key generator) for your software. On top of this cryptographic validation, CryptoLicensing provides various locks and limits like machine-locking, activated licenses, trial licenses, floating licenses, leased licenses, domain-locked licenses, beta licenses, licenses with user-data, licenses with flags/features and more. These settings and limits along with the cryptographic validation form an excellent first line of defense. It is upto you to provide the next line of defense. The following are some useful tips and guidelines for designing effective licenses using CryptoLicensing and writing effective license validation code using the CryptoLicensing validation API.

Licensing, Copy-Protection And Activations That Actually Works! CryptoLicensing for.Net is a 100%.Net licensing solution for any C# and Visual Basic.Net (VB.Net) software including: Windows Forms (WinForms), WPF applications,console apps, components and controls. The following are some useful tips and guidelines for designing effective licenses using CryptoLicensing and writing effective license validation code using the CryptoLicensing validation API. The philosophy is simple: to make it as difficult as possible for the hacker to 'crack' your software and cause the hacker to lose.

The philosophy is simple: to make it as difficult as possible for the hacker to 'crack' your software and cause the hacker to lose interest in your software or not make it worthwhile for him/her. Check license repeatedly Instead of checking the license at software startup only, check the license at multiple points of time during your software execution and from multiple places in your code. Do not use a single license validation routine in your software. Neodownloader 2 9 Build 165 Bus. Check for a license from different places in your software, but don't call a single license validation routine to do this. This ensures that a hacker cannot bypass your licensing scheme by simply hacking a single piece of code in your software and forces the hacker to locate every piece of license validation code in your program. Use multiple licensing checking layers In addition to the normal license validation done every time your software is executed, add another layer which checks for a license when a certain random criteria is met.

For example, you can check for a license on the 2nd Monday of each month, or every 63 days, or on the February 29th of a leap year. If a hacker bypasses the normal license checking code, the additional 'guerilla' layer is still present which will check for a license and cause the check to fail. Use encrypted dlls Move some important part of your software in a dll and encrypt the dll using a key. When generating licenses using, embed this key in your license codes (use the custom user-data feature of CryptoLicensing for this) and decrypt the dll using this key before loading it. This ensures that even if a hacker bypasses licensing checking code, your software will not function correctly since it will not be able to load the encrypted dll file. Check for the hash of your exe/dll to detect tampering You can include the hash/checksum of your exe/dll in your license codes generated using (use the custom user-data feature of CryptoLicensing for this). When your exe/dll is loaded, you can recalculate the hash of the exe/dll, and compare it with that included in the license code.

If different, this means that your exe has been tampered or modified. Similar to license checking, perform this check at multiple points of time and place in your software. Do not display failures immediately If a license check fails, note this, but do not immediately display to the user that the check has failed. Instead wait for some other part of your software to run and notify the user there. This makes it more difficult for the hacker to locate and bypass your license checking. Don't use explicit error messages When notifying the user of a failed license check, don't use explicit and obvious messages such as 'License not valid'.

Instead, display a generic failure message and ask the user to contact your support department. He may not know that the cause of the error is a failed license check, and when contacted, you may try to make a sale and convert the illegal user into a licensed user or even catch a hacker if he contacts you.

Crash or fail or output incorrect results when license check fails In combination with above two, when a license check fails or when you determine that your software has been hacked or your license scheme has been compromised, note this and when your software perform some processing at a later point of time, you can crash your software or output incorrect results. Sometimes, a hacker may also lose interest in your 'buggy' program which does not even display informative error messages! Embed user information in generated licenses When generating licenses, embed some data about the user in the license such as the user's name, email or company name (use the custom user-data feature of CryptoLicensing for this). Display this information prominently at multiple places in your software. This is a very effective way to discourage the user from sharing his/her license code with others. Conclusion Using the above tricks, tips and techniques along with a secure cryptographic licensing and copy-protection system like CryptoLicensing can thwart the efforts of the best of hackers and crackers and provide very good defenses against piracy of software. Product Info & Fully Functional Trial Download: Developer.

Comment posted by Nicolas on Friday, December 3, 2010 3:32 AM 'In combination with above two, when a license check fails or when you determine that your software has been hacked or your license scheme has been compromised, note this and when your software perform some processing at a later point of time, you can crash your software or output incorrect results. Sometimes, a hacker may also lose interest in your 'buggy' program which does not even display informative error messages! ' I would not try to make my program buggy even to a non licenced user. Even if the guy didn't pay for the product, if he like it, it will spread the word.

And if he dislike it, even more. You don't want false bugs to destroy your reputation. Comment posted by Nicolas on Friday, December 3, 2010 3:38 AM @Eduardo Because by definition security on client side doesn't work. Let say the hacker paid the full licence. Then he has a fully decrypted version of the program in memory. All he has to do is to save the decrypted version of the program and remove the parts of the code that check the licence.

When doing security on client side, you can just make the work of the hacker harder and discourage the average guy, so fewer guys will use an unlicenced version. If you need high security, you need to take care of security on server side.

CryptoLicensing for.Net is a 100%.Net solution to add licensing, copy-protection and activation capabilities to your.Net, Windows Forms (WinForms) and WPF applications, components and controls and ASP.Net web sites. CryptoLicensing uses the latest military strength, state-of-the-art cryptographic technology to ensure that your software and intellectual property is protected. * Protect your intellectual property, increase sales and maximize ROI. * Variety of licensing rules for the most common licensing scenarios. Create cryptographic licenses for full versions of your software. Create evaluation or trial versions.

Add online or manual activation and hardware locking. On-demand licenses.

Subscription licenses. * Flexible and adaptable licensing to suit your exact needs. * Secure and unbreakable cryptographic licenses offer maximum protection to your software. * User friendly activation and hardware locking scheme. * Fast, reliable, light-weight and simple API to integrate in your software.

License Features -------------------------- * Latest cryptographic technologies used for license generation and validation which provides the highest security and copy-protection to your software. Insaniquarium Deluxe Patch Francais. * Support for hardware-locked and activated licenses. * Support for floating licenses. * Every license code is guaranteed to be unique, even if you generate thousands of codes at a time. * Ready-to-use license server for * Support for evaluation licenses with various evaluation parameters such as * Support for up to 31 license features which allow enabling/disabling specific functionality in your software. A common use of this is to define 'editions' of your software such as a 'Standard', 'Professional' and 'Enterprise' edition. CryptoLicensing For.Net 2009 Components and Libraries software developed by LogicNP Software.

The license of this components and libraries software is shareware$, the price is 149.00, you can free download and get a free trial before you buy a registration or license. Do not use illegal warez version, crack, serial numbers, registration codes, pirate key for this components and libraries software CryptoLicensing For.Net. If you want to get a full and unlimited version of CryptoLicensing For.Net, you should buy from original publisher LogicNP Software. File Size: 21.80Kb License: Shareware Price: $149.00 Related: - - - - - - - - - - - - - - - - - - - Platform: Win98,WinME,Windows2000,WinXP,Windows2003,Windows Vista Starter,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Business,Windows Vista Enterprise,Windows Vista Ultimate,Windows Vista Home Basic x64,Windows Vista Home Premium x64,Windows Vista Business x64,Windows Vista Enterprise x64,Windows Vista Ultimate x64 System Requirements:.Net Framework v1.0 or higher, Downloads: 245 Category.