SchemaShroud C# Data Anonymizer

Secure Data Obfuscation for .NET Applications

SchemaShroud provides targeted data anonymization for C# objects through declarative attributes. Designed for developers handling sensitive information in non-production environments.

Core Features

• Attribute-based field marking
• Four anonymization strategies
• Recursive object processing
• Custom strategy support

Installation

1. Clone repository
2. Include these files in your project:
   • DataAnonymizer.cs
   • SensitiveDataAttribute.cs
   • AnonymizationStrategies/**

Usage

1. Annotate model properties:

public class CustomerRecord
{
    [SensitiveData(AnonymizationMethod.Hash)]
    public string Email { get; set; }

    [SensitiveData(AnonymizationMethod.Mask)]
    public string PaymentCard { get; set; }

    [SensitiveData(AnonymizationMethod.Range, Interval = 1000)]
    public int Salary { get; set; }
}

2. Process objects:

var processor = new DataAnonymizer();
var cleanData = processor.Anonymize(rawData);

Anonymization Methods

Method	Behavior	Example
Hash	SHA256 conversion	"[email protected]" → hex
Redact	Fixed replacement ("***")	"John Doe" → "***"
Mask	Last 4 visible, others starred	"4111111111111111" → "************1111"
Range	Rounds to nearest interval	1234 → 1000 (interval=1000)

Customization

Extend strategies by implementing IAnonymizationStrategy:

public class NoiseStrategy : IAnonymizationStrategy
{
    public object Anonymize(object value)
    {
        return (int)value + new Random().Next(-100, 100);
    }
}

// Configure:
var strategies = new Dictionary<AnonymizationMethod, IAnonymizationStrategy>
{
    { AnonymizationMethod.Range, new NoiseStrategy() }
};
var processor = new DataAnonymizer(strategies);

Requirements

• .NET Standard 2.0+
• No external dependencies

Limitations

• Requires mutable properties
• Primarily handles string/numeric types
• No built-in collection support

Contributing

Issue reports and pull requests welcome. Maintain test coverage when submitting changes.

License

MIT - see LICENSE file