How Can I Password-Protect a SQLite Database in C#?

Protecting Your SQLite Database with a Password in C#

A developer recently faced the challenge of securing a rapidly growing SQLite database table. The solution required a robust password protection mechanism.

Implementing Password Protection

This guide demonstrates how to password-protect a SQLite database using C# and the freely available SQLite library.

Setting the Password:

The following code snippet illustrates how to establish a connection and set a password:

<code class="language-csharp">// Create a connection to the database
SQLiteConnection conn = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;");

// Apply the password to the connection
conn.SetPassword("password");

// Open the database connection
conn.Open();</code>

Accessing the Protected Database:

To access the protected database, you'll need to include the password in the connection string:

<code class="language-csharp">// Create a new connection, including the password
conn = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;Password=password;");

// Open the connection
conn.Open();</code>

This method effectively blocks access through standard GUI database editors. However, be aware that some specialized tools might still decrypt the database if provided with the password. The underlying encryption algorithm is RSA.

Modifying and Removing the Password:

The password can be changed or removed as follows:

Changing the Password:

<code class="language-csharp">// Modify the password
conn.ChangePassword("new_password");</code>

Resetting/Removing the Password:

<code class="language-csharp">// Remove the password
conn.ChangePassword(String.Empty);</code>

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