Ampère Key
Discover on LinkedIn. Protect the payload on Ampère Key.
LinkedIn stays the professional graph. Ampère Key is Marcantonio Global's post-quantum handoff for sensitive government and commercial content. Agentic Fortress is the standing build around the customer, when you ask for it.
The handoff
LinkedIn finds the people. Ampère Key seals the content.
Ampère Key is a Marcantonio Global subscription: post-quantum sealed mail, in and out, and sealed rooms for a named cohort.
- Business-development leads in dual-use, defense, and critical infrastructure
- Centurions
- Private-equity and merger deal teams
- Commercial teams that already make introductions on LinkedIn
It is an adjacent path for sensitive commercial work, including CUI-adjacent workflows, under the customer's own policy. It is not a classified system you can buy.
Limits
What Ampère Key is not
These limits are part of the product. A build that would have to cross one of them does not ship.
Not LinkedIn E2EE
LinkedIn messaging is not end-to-end encrypted. Ampère Key does not change LinkedIn, and it does not encrypt LinkedIn.
Not an overlay
Not a browser extension, and not an interface placed on top of LinkedIn. A person pastes an invite link or a non-sensitive note. Marcantonio Global does not send LinkedIn messages.
Not a classified network
Not a substitute for an accredited classified system. LinkedIn is for discovery. Classified and high-assurance work stays on accredited systems the customer already uses. A seat is not FedRAMP authorization and not an Impact Level.
Not entanglement messaging
Entanglement does not carry messages. Ampère Key does not claim quantum-key-distribution messaging, and it is not "quantum email." The seal is NIST post-quantum cryptography.
Not a scraper, and not an automated sender. Not an official LinkedIn encryption partner. Working beside LinkedIn is not a LinkedIn endorsement.
How it moves
From a LinkedIn introduction to a sealed handoff
- Discover on LinkedIn. A profile, a post, Sales Navigator, or a warm introduction. LinkedIn stays the professional graph.
- A person points the way. Someone pastes an Ampère Key invite link, or a non-sensitive note to move to a sealed channel, into LinkedIn. That step is always a human action.
- Protect the payload on Ampère Key. Sensitive content leaves LinkedIn inside post-quantum sealed mail or a sealed room.
- Step up under customer policy. When assurance has to rise, the customer uses an approved government or contractor email path, archive, or accredited system. Marcantonio Global hands the work off. It does not impersonate those systems.
- Agentic Fortress, if you want it. A custom build around that customer. It is separate from the monthly Ampère Key seat.
Pilot
Free for 3 months, then $33 per month
The cohort is opt-in, sized, and named. There is no open blast of seats.
Pilot protection
Free
3 months
Post-quantum protected communications for an opt-in seat.
Steady state
$33
per month
The ongoing Ampère Key protection seat after the third month.
Agentic Fortress
Custom
scoped per organization
A separate build around the customer. The $33 seat does not include it.
Ask about Agentic FortressCryptography
NIST post-quantum cryptography
The envelope is ML-KEM-768, AES-256-GCM, and ML-DSA-65. The stack is post-quantum first.
| Layer | Specification |
|---|---|
| Key establishment | ML-KEM-768 (FIPS 203) |
| Bulk encryption | AES-256-GCM |
| Signatures | ML-DSA-65 (FIPS 204) |
The sealed message goes by email. The recipient private key, or an equivalent out-of-band secret, goes by a different channel, such as Signal, a phone call, or an in-person handoff. Sending both on the same channel breaks the model.
Request an opt-in pilot seat
Three months of Ampère Key protection at no charge for a named seat. After the third month, the seat is $33 per month. Ask about Agentic Fortress when you want the standing build.
Contact Marcantonio GlobalThe button opens the existing contact page. A message is a request, not a confirmed seat. This page is not legal advice.