About NuDefndr
Military-grade photo security meets on-device scanning. Your private moments, protected by technology that never leaves your hands.
The Problem We Solve
You hand your phone to a friend to show them a photo. They swipe. Then they see something you forgot was there—a photo from months ago that you completely forgot about. The moment gets awkward. You wish you had known it was there.
This happens more often than people admit. Your camera roll contains thousands of photos, and buried somewhere in there might be:
- Photos from past relationships you're not ready to delete
- Body progress photos you took for personal tracking
- Medical photos you meant to show a doctor
- Artistic or experimental photos that are personal to you
None of these are shameful. But all of them deserve to stay private unless you choose to share them.
NuDefndr solves this problem: Find what's buried in your library before someone else does. Then lock it away where only you can access it.
Our Approach
Traditional photo vault apps require you to trust their servers, their encryption implementation, and their promises not to access your data. Even with "end-to-end encryption," most services can technically decrypt your photos because they control the encryption keys.
We took a different approach. NuDefndr uses Apple's on-device machine learning frameworks to identify sensitive photos entirely offline. The scanning happens locally on your iPhone's neural engine—no cloud processing, no external APIs, no data transmission.
Once identified, photos can be encrypted with ChaCha20-Poly1305 military-grade encryption and stored in a Face ID-protected vault. We don't hold the keys. We can't decrypt your vault. We can't "recover" your password. That's by design.
If we can't access your data, no one can. Not hackers. Not governments. Not us.
Core Principles
100% On-Device
All photo analysis happens locally using iOS CoreML frameworks. Your photos never leave your device for "processing in the cloud." The neural network runs on your iPhone's dedicated ML hardware with zero internet required.
Advanced Encryption
256-bit ChaCha20-Poly1305 encryption—the same standard used in modern VPNs and secure messaging. Your vault password never leaves your device and is protected by iOS Keychain with hardware-level biometric authentication.
Jailbreak Defense
Multi-layer integrity checks (40+ filesystem scans, sandbox probes, runtime analysis) protect against tampering on compromised devices. Security monitoring runs continuously to detect threats.
Zero Cloud Upload
We don't have servers to upload to. No "sync across devices." No "backup to our cloud." Your vault exists only on your iPhone, encrypted with keys only you control. If you lose your device, the data is gone—that's the point.
Why Trust Matters
When you store sensitive photos, you're making a trust decision. With cloud-based vaults, you're trusting:
- The company not to access your data
- Their security to never have breaches
- Them not to comply with government decryption requests
- Employees to not abuse their access
NuDefndr eliminates the need for trust.
We can't access your vault because we never have the keys. We can't decrypt your photos because encryption happens locally with your biometric authentication. We can't "recover" lost access because we never see your authentication in the first place.
This architecture means you're in complete control. The trade-off? If you forget your Face ID or lose your device, your vault contents are permanently inaccessible. That's the cost of true privacy—there's no backdoor, no "master key," no way around your encryption.
"If I had access to your data, someone else could force me to access it. By making it impossible for me to access your vault, I'm protecting you from threats I can't control." — The NuDefndr Philosophy
Open Source & Auditable
Key security components of NuDefndr are open source on GitHub. Security researchers worldwide can audit our encryption, verify zero-network claims, and validate our threat model.
Auditable Code
Review VaultCrypto, JailbreakDetection, and security implementations
Security Docs
Threat models and cryptographic validation publicly available
Community Verified
Security researchers can verify our claims independently
Part of Dro1d Labs
NuDefndr is developed by Dro1d Labs, an independent software studio creating privacy-first applications for iOS and macOS. Every app we build shares the same foundation: your data belongs to you, and we have no interest in changing that.
"We don't want your data. We don't want to know who you are. We don't want analytics or insights into your behavior. We build tools that work - and leave you alone."
That's the philosophy behind NuDefndr. Simple. Private. Under your control.