KyberLock

Tracking since Apr 1, 2026.

Changelog

• May 29, 2026
  description

  TAKE PRIVACY INTO YOUR OWN HANDS
  
  End-to-end secure encryption, plus steganography for email and real-time chat, safe against quantum computers.
  
  KyberLock is the next step in the evolution of PassLok, also in this store. Like its predecessor, KyberLock does not use servers that might compromise your information. Everything is done offline. 
  
  KyberLock stores nothing secret, not even in your device.
  
  With KyberLock, you can: 
  - Write messages than only the intended recipient can read. 
  - Do this without having established a secret password. 
  - Lock files and images as easily as text.
  - Establish a real-time peer-to-peer chat involving text, files, audio, and video
  - Digitally sign text, images, and files so others can be sure they come from you. 
  - Convert your favorite email or texting app into a secure communication channel. 
  - Hide private information as apparently innocent text, or inside images. 
  - Use Decoy mode, so your true message is not what it appears to be. 
  - Create messages that can be read only once. 
  - Communicate across platforms, even without a network.
  - Send confidential mailings to several people at the same time. 
  - Use a borrowed device in case yours is bugged. 
  - Be as paranoid as you like. We are really paranoid, and this is why we developed KyberLock. 
  
  KyberLock is built on the recently standardized Crystals-Kyber encryption method, based on the math of Module Lattices. Unlike current methods, this method is expected to be safe against quantum computers for many years to come. On top of that, KyberLock uses 256-bit XChaCha20 encryption to complete the locking process. XChaCha20 is a high-performance, open source cipher, which has been scrutinized by experts for nearly a decade without any practical weaknesses being found.
  
  The first time you run KyberLock, it helps you to come up with a strong text-based secret Key, which can be whatever you want it to be. KyberLock places no restrictions to make sure that you can always remember your Key without ever having to write it down. 
  
  From your secret Key, KyberLock creates a Lock, which is a piece of random-looking text that you give to the people you wish to send messages to you. They will "put your Lock" on those messages, and only your Key, which you have given to no one, will be able to unlock them.
  
  This is the Chrome app version of KyberLock, essentially identical to the versions released for computers and mobile platforms. In addition, there is a pure html version of KyberLock at: 
  https://kyberlock.com/app
  
  If you want to check it out, you should save that page as HTML only, get the SHA256 of that with an external program or web page, and compare it with the value below. This is not necessary for app store versions like this one, which are code-signed by the app store.
  
  This is the SHA256 for the single-file html version of KyberLock 1.0.1:
  1024-6687-b546-9561-7eb4-0527-311a-cfbc-e8bc-e6c8-ed4b-a51b-4acd-85b8-e153-baab
  
  Watch the developer reading this: https://www.youtube.com/watch?v=EUYE_6gBuLo

  TAKE PRIVACY BACK INTO YOUR OWN HANDS
  
  Uncompromising, post-quantum end-to-end encryption and steganography for email, files, and real-time chat.
  
  KyberLock is the next evolution in secure communication. Designed as true sovereign software, KyberLock operates entirely independent of servers that could compromise, monitor, or leak your data. Everything executes locally on your machine. We store nothing secret—not in the cloud, and not on your device.
  
  WHAT YOU CAN DO WITH KYBERLOCK:
  
  True E2E Messaging: Write messages that only your intended recipient can decrypt, without ever needing to pre-arrange a shared password.
  
  Universal Locking: Secure files and images just as easily as text.
  
  P2P Secure Chat: Establish real-time, peer-to-peer rooms for text, files, audio, and video—completely serverless.
  
  Digital Signatures: Cryptographically sign text, images, and files so recipients know with absolute certainty they came from you.
  
  Platform Agnostic: Turn your favorite webmail or messaging platform into a secure, encrypted channel.
  
  Advanced Steganography: Hide encrypted payloads inside apparently innocent text narratives or embed them invisibly into image files.
  
  Decoy Mode: Create plausible deniability by ensuring your true message isn't what it appears to be.
  
  Read-Once Delivery: Generate messages that permanently self-destruct after a single successful decryption.
  
  Cross-Ecosystem Compatibility: Communicate seamlessly with users on Privacy Bar, our newest and greatest app.
  
  Offline Persistence: Run the app entirely offline. Communicate securely over local networks or air-gapped machines.
  
  THE POST-QUANTUM ADVANTAGE
  KyberLock is engineered for the future, built around the recently standardized ML-KEM (Crystals-Kyber) cryptographic algorithm based on module lattices. Unlike traditional RSA or ECC methods, this architecture is mathematically designed to withstand decryption attempts from tomorrow's quantum computers.
  
  To complete the encapsulation, KyberLock uses the incredibly fast, high-performance xsalsa20 encryption cipher—an open-source standard rigorously vetted by the cryptographic community for years.
  
  HOW IT WORKS
  The first time you run KyberLock, it helps you generate a Master Key from a text phrase of your choosing. We enforce no arbitrary rules—your Key can be anything you can easily remember, ensuring you never have to write it down.
  
  From this Key, KyberLock generates a public "Lock" (a block of random-looking text). You share this Lock with anyone. They use it to seal messages meant for you, and only your Master Key—which never leaves your brain—can unlock them.
  
  TRANSPARENCY & AUDITING
  KyberLock is available here as a Chrome Extension, but is identical in function to our standalone desktop and mobile web applications.
  
  You can run and audit the pure web version at:
  https://kyberlock.com/app
  
  If you want to verify the web integrity yourself, save the page as HTML, hash it with an external SHA256 tool, and compare it. (Note: This step is not necessary for this Web Store version, as it is intrinsically code-signed by Google).
  
  Current SHA256 for kyberlock.com/app index.html:
  211b66df03ccf366a9b35c0a1c373b1a187157e8ed1f905c0a0d459813cf6d9d

Permissions & access

Permissions

storage

Host access

None declared

Screenshots

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