Solutions / By need
Protect your .NET application from reverse-engineering
Managed .NET assemblies decompile back to near-source C#. Nebula.NET makes yours impractical to read, copy or tamper with — without changing how you build or ship.
The challenge
The .NET compiler emits IL and rich metadata, so a free decompiler turns your shipped assemblies back into clean, well-named C# in seconds. Your algorithms, embedded secrets, API endpoints and — critically — your licensing logic are all right there to read.
That exposure has direct commercial consequences: competitors clone hard-won features, attackers lift keys and credentials, and a determined user patches out a license check in an afternoon. For commercial and IP-sensitive software, unprotected IL is effectively open source you did not intend to publish.
How Delta1 Labs helps
A layered approach
Obfuscate the surface
Rename types and members to meaningless symbols, strip metadata, and encrypt strings and resources so a decompiler yields noise instead of readable logic. Renaming is renaming-safe across reflection and serialization with configurable rules.
Virtualize the crown jewels
Convert your most sensitive methods to a custom virtual-machine bytecode that never exists as IL at all. An attacker no longer decompiles your logic — they face an interpreter they must first reverse-engineer.
Harden at runtime
Anti-tamper verifies integrity and anti-debug detects attached debuggers, so a modified or instrumented build fails closed instead of running — turning a static-analysis problem into a moving target.
Capabilities
What you get
- Symbol renaming & metadata reduction
- Deterministic or randomized renaming with rules for reflection, DI and serialization.
- String & resource encryption
- Secrets and literals are decrypted only in memory, at use.
- Control-flow obfuscation
- Method bodies are restructured so decompilers emit tangled, uncompilable output.
- Method virtualization
- The highest-value routines run as protected VM bytecode, not IL.
- Anti-tamper & anti-debug
- Runtime integrity and debugger checks make modified builds fail closed.
- Broad target support
- .NET Framework 4.8 and .NET 6–10, desktop and server, CLI- and CI-friendly.
Built with
Outcomes
- Decompiled output is unreadable and uncompilable, not clean C#.
- Your most valuable algorithms never appear as IL.
- Tampered or debugger-attached builds refuse to run.
- Protection runs in CI with no source changes.
Frequently asked
Questions, answered
Does protection change how I build or ship?
No. Nebula.NET runs as a post-build step on your compiled assemblies — add it to CI and your artifacts come out protected. No source changes.
Will obfuscation break reflection or serialization?
Renaming is rule-aware: you exclude or shape members that reflection, DI containers and serializers depend on, so runtime behavior is preserved.
Is virtualization applied to everything?
No — you target it at the methods that matter (licensing, core algorithms). Virtualizing everything is unnecessary and costs performance; selective use keeps overhead negligible.
Let's talk about your setup
Tell us what you're building — we'll help you protect, license and ship it, managed or self-hosted.