CORROSION
Oxidation resistant
Brass does not rust.
INVISIBLE SEED PHRASE • UNIVERSAL BIP39
Your words disappear.
Your backup remains.
SATONA automatically converts every BIP39 word into universal binary before it is permanently marked onto a solid brass plate. Even if someone discovers your backup, your Seed Phrase never appears in plain text.
Compatible with BIP39 recovery phrases used by leading wallets. Wallet logos are compatibility references, not endorsements.
THE CONCEPT
Every word becomes a code.
Never readable information.
The standard is based on an immutable list of 2,048 words numbered from 0 to 2,047.
SATONA converts the index of each word in your Seed Phrase into binary code using our tool available here, then lets you permanently mark the plate with the automatic center punch included in the kit.
BUILT TO SURVIVE
Designed to withstand the elements.
A physical backup designed to withstand fire, corrosion, impacts and time.
TEMPERATURE
Melting point ≈ 930°C
Beyond the temperatures of a typical house fire.
STRENGTH
≈ 100 MPa
Resists impacts and crushing.
TIME
Decades
Designed to last for decades, in open air or prolonged immersion.
PROCEDURE
Prepare your backup in four steps.
01
Convert
Find the binary equivalent of each word in your recovery phrase.
Use the converter below or download the BIP39 list to work fully offline.
02
Assemble
Unscrew the conical end of the automatic center punch, insert one of the two supplied tips, then screw it back together.
The center punch is then ready to use.
03
Mark
Place the tip in the center of the square to be marked, then apply pressure until it clicks.
Repeat up to 8 times on the same square for a deeper, durable mark.
04
Verify & hide
Before storing your plate, carefully check every mark to ensure your phrase can be correctly reconstructed.
Once verified, keep the plate in a discreet, secure place known only to you.
WHY PHYSICAL
Paper degrades. Online tools create exposure.
A recovery phrase is a critical secret. SATONA provides a physical format for thoughtful offline storage, without replacing good security practices.
01
Offline
The entire conversion is performed offline. Your Seed Phrase never leaves your environment.
02
Binary
Each BIP39 word is converted into its universal binary index before marking.
03
Permanent
The automatic center punch permanently marks the brass plate. No hammer, batteries or electrical device are required.
OFFLINE FIRST
Your recovery phrase should never leave an offline environment.
For real-world use of SATONA, use the downloadable BIP39 list and perform the entire conversion process offline.
RISK 1
Keyloggers and malware
A compromised device can record what you type, including your recovery phrase.
RISK 2
Browsers, extensions and online services
A phrase entered on a website can be exposed through a malicious extension, a security vulnerability or an already compromised device, even if the website itself does not store the data.
RISK 3
Potentially irreversible consequences
Anyone who obtains your recovery phrase may be able to restore your wallet and take control of the assets it protects.
Never enter your complete recovery phrase on satona.fr or any other website.
SATONA’s online tools are intended for learning or converting a single word. For real-world use, work entirely offline.
PRODUCT INFORMATION
What is known today.
The repository documents the SATONA plate and binary encoding workflow. Exact kit contents, material specifications and commercial terms need confirmation before publication.
Information to confirm
- Exact box contents
- Material and dimensions
- Price, delivery, returns and warranty terms
FAQ
Simple answers.
Is SATONA an electronic wallet?
No. SATONA is a physical medium designed to back up the information in a BIP39 recovery phrase in binary form.
How is SATONA different from a hardware wallet such as Ledger or Trezor?
A hardware wallet holds and uses the private keys required for wallet operations. SATONA is not a wallet: it physically backs up BIP39 recovery information so it can be reconstructed if needed. Their roles can therefore be complementary.
Are my cryptocurrencies stored on the SATONA plate?
No. SATONA stores no digital assets. The plate contains only the binary representation of the recovery information you choose to record.
Why protect the recovery phrase so carefully?
Anyone with your complete recovery phrase could potentially restore the corresponding wallet on a compatible device and access the assets it protects. Treat it as highly sensitive information.
Is SATONA compatible with my wallet?
SATONA is intended for wallets that use an English BIP39 recovery phrase of up to 24 words. Check your wallet documentation before use; not every wallet uses BIP39.
Do I engrave the words?
No. You mark the 11-bit binary index of each BIP39 word, not the word itself.
How many words can I back up?
SATONA can encode up to 24 BIP39 words: words 1–12 on the front and words 13–24 on the back.
Can I use SATONA without an internet connection?
Yes. After downloading the BIP39 list, the complete conversion and marking process can be performed offline; this is the recommended method.
What exactly is included in the SATONA kit?
The kit includes one solid-brass SATONA plate, one automatic centre punch, two tips, one premium magnetic box, one instruction leaflet and one QR code providing access to the SATONA instructions.
SATONA
Protect your recovery phrase.
Keep it offline.
Complete SATONA kit
€49.90
A DIFFERENT SPACE
SATONA
ACADEMY
Understand. Own. Protect.