Download of CrypKey SDK 7.2.50 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of the software is Crypkey (Canada) Inc.
The software lies within Security Tools, more precisely Privacy. The following version: 7.2 is the most frequently downloaded one by the program users. CrypKey SDK is developed for Windows 7 environment, 32-bit version. Stelthui.exe is the default file name to indicate this program's installer.
From the developer:
CrypKey SDK is a powerful software licensing and protection for program developers. It is an encryption tool that protects your developed applications against illegal copying and unauthorized use. The flexible licensing models include perpetual, day-limited, use-limited, floating network and USBKey locked.
You may want to check out more software, such as Apache Flex SDK Installer, Bopup IM Client SDK or VintaSoft Imaging.NET SDK, which might be similar to CrypKey SDK.
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