They're watching. Every message.

Alice
Not secure

Hey, can you send me the account details?

10:42 AM

Sure, the password is Summer2024!

10:43 AM

Got it. What about the PIN?

10:44 AM

It's 4729. Don't share this with anyone.

10:45 AM

Without encryption, every keystroke is exposed.

INTEL BRIEFING

Post-quantum encryption messaging without thevaporware

Other vendors talk about post-quantum roadmaps. NoChat ships it.

CLASSIFIED
DECLASSIFIED

ML-KEM (Kyber-1024)

The NIST-standardized post-quantum KEM. Session keys are wrapped so that even a future quantum adversary can't unwrap them.

CLASSIFIED
DECLASSIFIED

AES-256-GCM Content

Every message is encrypted with 256-bit AES in GCM mode — symmetric encryption already considered quantum-safe at 256 bits.

CLASSIFIED
DECLASSIFIED

Harvest-Now Resistant

Captured ciphertext today stays ciphertext tomorrow, even against an adversary with a large quantum computer in the 2030s.

CLASSIFIED
DECLASSIFIED

Hybrid Key Exchange

Where appropriate, NoChat combines classical ECDH with post-quantum KEM so a break in either primitive alone doesn't compromise the session.

All features auditable. View source code

Industry First

Post-quantum encryption messaging
is the whole point

A quantum computer that can break RSA and ECC will retroactively decrypt every classical message ever captured. NoChat is the only widely used messenger closing that window today — and it costs you exactly nothing extra.

NIST Approved Standards

The same cryptography the US government will use

ML-KEM

Key encapsulation

Kyber-1024

ML-DSA

Digital signatures

Dilithium3

Harvest Now, Decrypt Later

Why this matters today, not tomorrow

Nation states are already storing encrypted communications. When quantum computers arrive, they'll decrypt years of captured data instantly.

NoChat protects your messages against this threat today

Signal, WhatsApp, Telegram — none offer post-quantum encryption. NoChat does.

FAQ

post-quantum encryption messaging: questions, answered

The most common things people ask about post-quantum encryption messaging.

What is post-quantum encryption messaging?

Messaging that uses cryptographic algorithms believed to be secure against attacks by quantum computers. NoChat uses ML-KEM for key exchange and AES-256-GCM for content — both are considered quantum-resistant at current parameter sizes.

Why does post-quantum encryption matter for messaging?

'Harvest now, decrypt later': adversaries are already capturing encrypted traffic in bulk, betting that quantum computers in the 2030s will retroactively decrypt it. Post-quantum encryption messaging closes that window for messages you send today.

What post-quantum algorithms does NoChat use?

ML-KEM (also known as Kyber-1024) for key encapsulation, the NIST-standardized post-quantum KEM. Digital signatures use ML-DSA (Dilithium3). Symmetric content encryption uses AES-256-GCM.

Does Signal or WhatsApp have post-quantum encryption?

Signal added PQXDH for initial key agreement, which is a good first step, but message content still relies on classical ratcheting. WhatsApp has no production post-quantum encryption messaging. NoChat's implementation covers both the key exchange and long-term hybrid mode.

Is ML-KEM secure?

ML-KEM is based on the Module Learning With Errors problem and was selected by NIST after years of public cryptanalysis. It's the current state of the art for post-quantum key encapsulation.

Is NoChat's post-quantum encryption slower?

The overhead is negligible in interactive messaging. Key encapsulation happens once per session, and content is encrypted with AES-256-GCM which is hardware-accelerated on modern devices.

Can I verify the post-quantum encryption is actually on?

Yes. The crypto stack is open source, and the E2EE status indicator in each chat shows the algorithm in use and a fingerprint you can compare with your peer.

Do I need to update my device to use post-quantum encryption?

No. Post-quantum encryption is enabled by default on all supported platforms — web, iOS, Android, desktop. If the app runs, post-quantum encryption runs.

Ready to go dark?

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No account required. No data collected. No compromises.

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FROM THE BLOG

Dispatches on private messaging

Reporting on encryption, anonymous messaging, and what it takes to build a secure messaging app with no phone number required.

Apr 13, 2026 · 7 min read

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Apr 13, 2026 · 7 min read

2026-04-04-digital-privacy-why-phone-number-free-messaging-matters

Apr 13, 2026 · 6 min read

2026-04-03-digital-privacy-in-question-why-secure-messaging-matters-mor

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Join the quiet ones

Join a community that values privacy over convenience.

0
secrets kept
100%
open source
256-bit
encryption
[INTERCEPTED]

"Finally, a messaging app that doesn't mine my data."

Anonymous

Privacy advocate

[INTERCEPTED]

"The encryption is rock solid. I've audited the code myself."

Anonymous

Security researcher

[INTERCEPTED]

"No phone number required? That's how it should be."

Anonymous

Someone who values privacy

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