what sign up
nixm nixm

← learn

Encrypted vs. never stored — protecting the record vs. having none

July 28, 2026

Encrypted chat (Proton Lumo's model) means your conversations are stored, unreadable to the operator — protection of a record. Never-stored (nixm's model) means the conversation is not written anywhere — absence of a record. Both are real privacy; they fail differently, and the difference is the decision.

Two philosophies, stated fairly

Zero-access encryption says: keep the record, make it unreadable to everyone but you. Proton's Lumo is the strongest mainstream example — chats stored under encryption Proton says even Proton can't open, history that survives your devices, projects that accumulate context. Ephemerality says: don't keep the record. nixm never writes the conversation to any database; what persists is a distilled seven-day signal. One preserves your thinking under lock; one lets it pass.

Where encryption is genuinely the right choice

Continuity. If you want your history — months of threads, searchable, cross-device — encrypted storage is how to want it responsibly, and "only you hold the key" is a serious architecture. The trade is inherent, not a flaw: the value of a persistent record and the exposure of one are the same property.

How the two fail differently

Failure is where architectures show their nature. A breach of encrypted storage yields ciphertext — strong, assuming implementation holds; a breach of nothing yields nothing, no assumption required. A subpoena against encrypted storage meets a real fight about keys and jurisdiction; a subpoena against nothing has no object — the 2025-26 OpenAI saga showed stored data being compelled at 20-million scale while never-logged tiers were carved out for having nothing to give. And time: ciphertext persists into a future of leaked keys, changed laws, and stronger computers; the dissolved is done being at risk. Encryption defends the record at every door, indefinitely. Absence has no doors.

The lock-versus-no-safe test

Ask of your own use: is this thinking I want to keep, or thinking I want to do? Journals, ongoing projects, reference threads — keep, encrypted. Working something out, asking what you'd rather not own, drafts that should die with their moment — do, ephemerally. Most people need both; almost no one is told they're choosing. The full claims-decoder for the rest of the field.

nixm's half of the answer, precisely

The conversation is never stored — not encrypted-then-kept, never written. The signal that persists holds intent, a short summary, and theme; it makes the link shareable and resumable, dissolves seven days after creation, and can be marked private meanwhile. For the thinking you came to do rather than keep. Ephemeral AI, defined.

Do some thinking that doesn't persist

Open nixm and seed a signal — no account, no record, and in seven days not even the trace.

frequently asked

What's the difference between encrypted and never-stored AI chat?

Encrypted (per Proton's Lumo model) stores conversations unreadably; never-stored (nixm) writes no conversation at all — a protected record versus no record.

Is zero-access encryption safe?

It's a serious architecture — the operator can't read stored chats — with the inherent trade that a record exists, persists, and depends on keys and implementation.

Which is better for privacy?

They serve different uses: encryption for history you want to keep securely; ephemerality for thinking that shouldn't persist at all. The failure modes decide it.

What happens to encrypted chats under subpoena?

A real legal and technical fight over an existing record — versus never-stored, where there is no object to compel, as zero-retention carve-outs in the OpenAI case showed.

What does nixm keep instead of the conversation?

A distilled signal — intent, short summary, theme — that primes the shareable link and dissolves 7 days after creation.

Can I try nixm without an account?

Yes — open nixm.ai and seed a signal directly; no sign-up, and nothing you type is stored.

try it now — nixm makes cinematic ai video, with sound. no subscription. first video free.

open the studio →

Enter your email and receive a link to sign in. No passwords, just a secure signal to connect.

why connect

  • 20 free credits to start
  • your signals, remembered
  • buy more credits anytime
  • image & video generation features
or
+