Harpocrates

Bulletproof symmetric encryption library for .NET Framework.
Many of the .NET encryption code examples found online are deeply flawed.
Harpocrates protects your data by protecting you from yourself.

(Ancient Greek: Ἁρποκράτης) was the god of silence, secrets and confidentiality in the Hellenistic religion.

Install

Using the nuget package manager…

PM> Install-Package Harpocrates -Version 1.1.0

or download the latest DLL (1.1.0) and import into your project.

Features

• The most secure options are chosen by default
• Separate key derivation for HMAC and AES
• Message authenticity is verified before decryption by comparing SHA-256 hashes
• Uses strongly random initialization vectors
• Configurable key hardening to prevent brute force attacks

Using Harpocrates

string encrypted = Harpocrates.Engine.Encrypt("secret!", "password");
string plaintext = Harpocrates.Engine.Decrypt(encrypted, "password");

Hardening the password with PBKDF2 helps prevent brute force attacks.
Pass a third parameter to specify the number of iterations.

string encrypted = Harpocrates.Engine.Encrypt("secret!", "password", 10000);
string plaintext = Harpocrates.Engine.Decrypt(encrypted, "password", 10000);