Ixnas Ixnas.AltchaNet by: Ixnas .NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 120,603 total downloads last updated 12/29/2025 Latest version: 1.1.1 captcha altcha anti-spam spam security C# implementation of the ALTCHA challenge.