The Only Seed Phrase Backup
You Will Ever Need
COMPATIBLE WITH:
Take your Crypto security to the next level
Syfra Cards offer a highly secure, offline solution for storing your cryptocurrency seed phrases, providing robust protection against water damage, tampering, and digital threats. Featuring open-source design and AES-256 military-grade encryption, Syfra Cards ensure that your private keys remain fully secure and exclusively under your control.
Millions of Crypto Wallets
Lost Forever
The Most Secure Way to Store Your Seed Phrase
EAL4+ Certified Chip
Common Criteria® EAL4 certification for chip hardware, waterproof, and extreme temperatures.
AES-256 Encryption
Your seed phrase is stored offline using millitary grade encryption. No cloud. No leaks. No compromises.
Offline & Untouchable
No serial numbers. No metadata. Fully air-gapped and trackless by design for maximum privacy.
25+ Years Data Retention
Stores data securely for nearly half a century, encrypted, offline, without batteries.
Own your keys. Own your crypto.
One Card. Every Wallet.
Syfra is a seed phrase backup method, not a closed ecosystem — so it works with any crypto wallet that supports seed phrases. Whether it's MetaMask, Ledger, Trust Wallet, OKX, Binance, Syfra simply stores what you choose — securely and offline.
Note: The logos shown are for illustrative purposes only. Syfra has no affiliation or endorsement relationship with the referenced wallets.
Enter Your Seed Phrase
Securely input your 12-24 words seed phrase using the Syfra mobile app.
Write to Syfra Card
Transfer the AES-256 encrypted seed phrase to your Syfra Card for future safe storage.
Recover Anytime, Anywhere
Scan the card and access or copy your seed phrase whenever you need it.
Get your Syfra now, thank us later.
Crack the Syfra Card — Claim the wallet.
We've published a genuine encrypted seed from a Syfra card tied to a live wallet. If you decrypt it, the wallet's funds are yours. That's how much we trust Syfra.
{
"p": "Syfra",
"ep": {
"e": "faEaujaZfOK4MUzEc4G3qz1KCXNpjeBBUWVkhCcT8fZogzy9WS1xZPTB/If3pWvtjuneCXWEzD2ZP19ImshExVA7moGxQ1YaPu3PFe1CdLw=",
"s": "3tR+5VS8+uyCnHQRdJU6FQ=="
},
"v": "01"
}Frequently Asked Questions
Consult our AI agent or get in touch with us if you need more information.
Syfra Assistant
How do Syfra cards protect my seed phrase?
How does the encryption on Syfra cards work?
Can I use Syfra cards offline?
How do I write my seed phrase to a Syfra card?
Which crypto wallets are compatible with Syfra cards?