The most secure, modular hardware wallet for your crypto. One shell, many keycards. Join our community: https://xitter.twitterapi.xyz/t.co/pMHQxid209
Switzerland
Joined January 2019
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end-to-end privacy pools (v1) transactions with kohaku-cli and keycard shell (air gapped) by @0xterricola
Keycard Shell retweeted
Privacy is a collective defence.
In my interview with @dif_fractions, we talk @Logos_network's Basecamp, the browser as stage zero of deanonymisation, @Keycard_ , the vanishing endpoint and why metadata resistance has to be architectural.
Live now:
diffractionscollective.com/2…
Keycard Shell retweeted
little know fact: shieldsigner includes @keycard_ support
A few of our Keycard teammates are at Devcon 8 in Mumbai! 🇮🇳
Around? Come say hi 👋
Let’s meet, talk crypto, and plan something fun.
Drop a comment or DM us and let’s make it happen!
@keycard_ spotted
My Shrooms dev agent built "Shrooms Backup" last night
The idea is simple - I have a bunch of machines on the mesh. Now most of them run "shrooms-backup" daemon which consists of restic + Logos Storage + the daemon orchastrating things.
They are all auto-discovered on the mesh (the benfit of shrooms:) and I can configure the backups via Basecamp and mobile app.
Backups are secured by Keycard and pushed to selected machines via Logos Storage.
I would not need to use Logos Storage, I could just push files around, but this gives me clear path to pushing data outside of the mesh in the future.
Still testing it, but looks pretty good so far:)
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things I 🧡 about Keycard
self-custody
open source
open hardware
air-gapped signing
no wi-fi
no bluetooth
no cloud
EAL6+ secure element
keys stay offline
PIN protection
NFC signing
QR signing
clear shell
physical verification
multiple seeds
one shell, many cards
replaceable battery (shell)
transaction details on screen
works with multiple wallets
what do you love about @Keycard_?
Keycard Pal is on F-Droid 💪
It's a OSS, community driven mobile app. It allows to use your @keycard_ with any QR software wallet ethereum & bitcoin
That's powerful for @keycard_ users
Keycard Pal, my air-gapped signing app for @Keycard_, is now on @fdroidorg
F-Droid rebuilds it from source and ships my signed APK only if the bytes match.
f-droid.org/packages/com.key…
f-droid.org/packages/com.key…
#FDroid #Keycard #Ethereum #Bitcoin #SelfCustody
Keycard Shell retweeted
Tangem is not a hardware wallet (it doesn't bring more security than a mobile phone) and all cards are at risk see donjon.ledger.com/blog/bypas… - if you like the form factor check out @Keycard_ or @satochip
Keycard Shell retweeted
🔥 I ranked 21 Bitcoin signers.
5 years in the shadows: testing hardware wallets, watching Bitcoin Twitter, following every hack, every bug, every vendor drama.
This is where I landed, & some of you won't like it.
My criteria:
🔓 Open code you can verify
📵 Air-gap: QR or microSD over USB, Bluetooth or NFC
🧱 Security model: secure element, stateless or smartcard
📜 Track record, and how the vendor reacts when things break
🔁 Standard backups (BIP39, PSBT, descriptors): no lock-in
🟥 S TIER
Open code, minimal trust in a vendor, and for most of them you can build or flash it yourself. The less you have to trust, the higher it goes.
🟧 A TIER
Serious, Bitcoin-focused tools. You trust the vendor more than in S, and you get polish in return. Yes, Coldcard stays in A after July's entropy bug. The transparent fix and migration guide count too.
🟨 B TIER
Good tools, each with a trade-off: a server in the security model, a newer approach still proving itself, a phone in the loop, or multi-coin roots.
🟩 C TIER
Multi-coin first, Bitcoin second.
⬜ D TIER
Closed code, or recovery models where a company holds part of the keys to your castle.
Now the twist: no signer is the best in the absolute. The right one depends on YOUR threat model. A ranking expires. A method doesn't.
That's the whole idea behind chapter 23 of Bitcoin Hodler: Choosing Your Signer. 📖
Where would you move one device? 👇
ALT https://kavsec.agency
Keycard Shell retweeted
Mis primeras impresiones de @Keycard_ 👇
Antes un resumen de porque la elegí:
• Es una mezcla de @Tangem y @KeystoneWallet
• Firmás con NFC o con QR
• Con QR ves en la pantalla del Shell lo que estás firmando
• La wallet de la tarjeta la podés borrar y generar otra, cada una te da su seed
• Todo open source
Existen más cosas, que no dejan de ser importante, pero no quería hacer un post muy largo, vayan a visitar su web 😉
Wallet con las cuales pueden usarla:
• Para redes EVM pueden usarla junto a @ambire, con QR en la extensión y NFC/QR en el celular, realmente el uso en muy fluido. Existen más opciones por ejemplo @Rabby_io, pero solo es con QR.
• Para BTC @SparrowWallet / @bluewalletio son opciones, pero existen más, en todas es solo con QR
Posibilidades:
• Una wallet diaria que pueden usar con Ambire por NFC
• Una wallet con fondos para hold para usar solo QR, viendo que se firma gracias al Shell
• Firmante de una @safe
Para mí es una muy buena opción, pero por supuesto nunca dejen de hacer ustedes su propia investigación, cualquier cosa preguntan 🫡
Keycard Shell retweeted
Your Nostr key, on a @Keycard_.
keycard-nostr-bunker is a NIP-46 bunker: clients connect over relays, the card signs and decrypts. The key never leaves it.
pipx install keycard-nostr-bunker
github.com/mmlado/keycard-no…
#nostr #NIP46 #Keycard #selfcustody #hardwarewallet #opensource
you should be more like @alisher
What does a stack built around resilient, user-controlled technology look like?
Take inspiration from @alisher of @Logos_network:
Hardware → @FrameworkPuter
Browser → @brave
Messenger → @ethstatus
Documents → @fileverse
Decentralized storage → @Codex_storage
Hardware wallet → @Keycard_
Email → @ProtonPrivacy
P2P sharing → @qbittorrent
Notes and knowledge → @anytype
Self-hosted media → @jellyfin
Music → MusicBee
Graphics → GIMP
Image upscaling → @upscayl
Reading → Calibre
Audio → Equalizer APO
Explore Alisher’s complete stack:
stacks.web3privacy.info/stac…
Running separate seeds doesn’t have to mean juggling wallet extensions
with Keycard Shell and @ambire , you can keep accounts from different seeds in one extension and switch between them as needed
each seed stays on its own Keycard
here’s how:
• insert your first card and enter its PIN
• select Connect Software Wallet → Ethereum
• scan the QR in Ambire, select an account and name it
• repeat with your next card
choose the account in Ambire, insert the corresponding card into Shell when you need to sign
separate seeds, without a separate workflow for each👇
Keycard Shell retweeted
Keycard Shell Review 2026 – Modular Air-Gapped Hardware Wallet
youtube.com/watch?v=uQrKg-sW…
#Keycard #Coldwallet #Cryptowallet @Keycard_
Transparency beats trust. So we made Shell hardware easy to verify.
Here are videos and pictures to help you check the integrity of your Shell:
docs.keycard.tech/en/help/ch…
that's the beauty of open source development
Work that came from this prototype was merged upstream to @Keycard_ !!!🥳 github.com/keycard-tech/keyc…
