Call and message, unexposed
Your identity stays yours. Not sitting in a telecom database, not sold to data brokers, not one breach away from being public.
Private communication · No carrier, no backdoor
Your number was never meant to be your identity.
Every calling app starts the same way. Hand over your phone number. It becomes your account, sold, leaked, and tied to everything you do. MYSTOR breaks that.
Identity layerSealed
Carrier recordChosen name
No phone number
No SIM card
No contact upload
Keys stay on your device
Why Mystor
No SIM card. No carrier in the middle. Just you, and the people you choose.
In MYSTOR you exist as a name you choose, not a number you were assigned by a company that can lose it.
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Real encryption, end to end
Every call and message is sealed with AES-256-GCM. What you say stays between you and the person you are talking to. Not carriers, not servers, not us.
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Built for everyone
Most number-free apps feel built for activists and engineers. MYSTOR feels like the apps you already use. No learning curve, no jargon.
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Your terms, your circle
No forced contact syncing, no address book uploads, no find friends scraping your phone. You bring people in by name, by choice, by trust.
The guarantee
What MYSTOR cannot see.
Any product can promise to behave well. This is the shorter and more useful list: the things the system is structurally unable to do, because the design does not give it the option.
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The words in your messagesText is encrypted on your device before it leaves. The server relays sealed content it has no key for.
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Who you are in real lifeThere is no phone number, no email and no identity document anywhere in sign-up. You choose a name and that is the account.
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Your address bookContacts are never uploaded or scanned. Nobody is mapped to anybody by importing a phone.
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Your private keysKey pairs are generated on your device and never transmitted. A copy of the whole database would still not open a single conversation.
The name
A word for a place where danger could not reach.
Built on WebRTC and AES-256-GCM, MYSTOR carries the same security discipline behind Legacy-Vault’s estate protection platforms, now turned to the ordinary act of talking to someone you trust.
No forced verification. No hidden metadata trail. A private line, built to hold.
מִסְתּוֹר
/mis·TOR/ · Mistor
- Definition
- A secret place. A hidden shelter. Protection. Refuge.
- In the ancient texts
- A concealed safe place where danger could not reach. A sanctuary. A cover from the storm.
Specification
Published, so it can be checked.
Security you cannot inspect is a slogan. These are the actual primitives in the shipping build.
Message cipher
AES-256-GCMAuthenticated encryption. A tampered message fails to open rather than opening wrong.
Key agreement
ECDH P-256A separate shared key is derived per conversation, on both devices, never on a server.
Passphrase hardening
PBKDF2 · 600,000 iterationsApplied to passphrase-protected identity files, to make guessing expensive.
Calls
WebRTC · DTLS-SRTPVoice and video are encrypted in transit by the transport itself, with STUN and TURN for difficult networks.
Server role
Ciphertext relayRealtime channels carry sealed payloads. The relay has no key material at any point.
Identity
Device-held key pairGenerated locally at first run. Moving to a second device is an encrypted transfer you approve by hand.
Independent review is welcome.
At a glance
Everything a private line needs. Nothing it doesn’t.
End-to-end encrypted
Voice and video calls
Private messaging
File sharing
Group calls
Mobile and desktop
No phone number
Keys held on device
Choose your name. Choose your circle. Choose your privacy.
No sign-up · No phone number · Just you