---
title: Use standard crypto algorithms
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Static Code Analysis (SAST) > SAST
  Rules > Use standard crypto algorithms
---

# Use standard crypto algorithms

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## Metadata{% #metadata %}

**ID:** `csharp-security/use-standard-crypto`

**Language:** C#

**Severity:** Error

**Category:** Security

**CWE**: [327](https://cwe.mitre.org/data/definitions/327.html)

**Related CWEs**:

- [328](https://cwe.mitre.org/data/definitions/328.html)
- [916](https://cwe.mitre.org/data/definitions/916.html)
- [1240](https://cwe.mitre.org/data/definitions/1240.html)

## Description{% #description %}

Implementing your hash/cryptographic algorithm may lead to errors and potential vulnerabilities. Always use proven algorithms that are available in the C# library ecosystem.

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```csharp
public class CustomHash : HashAlgorithm {
}
```

## Compliant Code Examples{% #compliant-code-examples %}

```csharp
public class MyClass {
    public void ComputeHash(byte[] data) {
        // Safe: using standard hash algorithm
        using (var sha256 = SHA256.Create()) {
            byte[] hash = sha256.ComputeHash(data);
        }
    }
}
```
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