https://tangem.com/en/blog/post/blind-signing-in-crypto/
https://www.reddit.com/r/kaspa/comments/14hathv/kaspa_a_summary_of_learnings/
- Open the Tangem app
- Tap Scan
- Tap the Tangem card to your phone's NFC module and scan it
- Select Create Wallet and scan the card again
- Select Back up now
- Tap Add a backup card and scan a second card
- Repeat the backup process for a third card if available
- Tap Finalize the backup process and then Continue
- Enter an access code and re-enter it
- Tap Submit and scan all the cards again
- Go to your wallet, tap the cryptocurrency you want to receive, and then tap Receive on the token page
- Open the app, select the token you want to sell, tap Sell, enter your email address, and choose where you want to receive your funds
How Tangem Wallet works
There are two components at play in the Tangem Wallet. The first component is the hardware wallet device — a pack of two or three Tangem cards required to create one wallet. The second component is the Tangem mobile app, available on iOS and Android. Let's see how these two components work together.
Tangem cards
Tangem cards come in a set of two or three. They are plastic cards with an inbuilt secure chip that functions as a microcomputer. When the card is manufactured, the chip generates its own key pair: the Kcardpriv private key and the Kcardpub public key.
These keys are unique to each card and are not connected to the future user's wallet. They're only required so that the card can prove its authenticity and tell the app that Tangem manufactured it. The card's replacement warranty is 25 years, based on the minimum chip lifetime.
The Tangem app
Because human beings cannot independently communicate and interact with microchips on a plastic card, there is a need for an interface or means of communication. That's precisely what the Tangem app is for. The Tangem app shows the functionalities of the Tangem wallet, including what assets are stored, asset management (send and receive crypto), and much more. So, how does a credit card-shaped wallet connect with your mobile phone?
How Tangem cards and app interact
Both Tangem wallet components interact via Near-field communication (NFC). NFC is a wireless connectivity technology that allows devices to communicate when brought within a few centimeters of each other using magnetic field induction.
NFC is based on inductive coupling between two antennas on NFC-enabled devices — your smartphone and the Tangem cards — communicating in one or both directions.
Features of the Tangem Hardware Wallet
Tangem redefines the hardware wallet experience by providing unrivaled security, simplicity, and usability. Users can enjoy complete independence and autonomy while managing their assets with a single tap. Tangem Wallet lowers barriers for crypto newcomers while improving the custodial experience for advanced users.
Security
Here's an overview of the Tangem Wallet's security features:
- Anti-counterfeit protection: The Tangem app verifies the authenticity of both the chip and the firmware.
- EAL6+ level: The Tangem chip has the highest chip security standard available. It is protected from invasive and non-invasive attacks. Private keys are generated inside the chip during wallet activation. Nobody has access to your private key, and it cannot be revealed under any circumstances, not even the extinction of the human race.
- Audited firmware: An independent audit by Kudelski Security confirmed that Tangem firmware has no backdoors or other vulnerabilities. The firmware is not updatable, and it has no hidden algorithms.
- Open-source app: The Tangem app is open-source on GitHub and has been verified by the community. There are no backdoors, and anyone can recreate the app if necessary.
- Autonomy: Tangem doesn't collect personal data or run servers to conduct transactions on the blockchain. It's just your wallet, the app, and the blockchain.
- Smart backup system. The chip in the card generates a random private key that never gets exposed. The cards establish a secure connection with each other and transfer your encrypted private keys. The keys are stored on three cards with no other copies in space and time.
- Access code protection: Tangem cards are protected against unauthorized access and brute-force attacks by the user's access code or biometric authentication.
Reliability
Tangem Wallet is IP68 certified and has Maximum resistance to dust and water. The Tangem chip was developed in cooperation with Samsung Semiconductors, Inc. It has a 25-year replacement warranty based on the minimum chip lifetime. The wallet's chip can operate at peak performance between –25°C to +50°C. It is also protected against EMP, ESD, and X-rays in compliance with ISO 7816-1 standard.
Privacy
Tangem servers are not involved in your crypto operations in any way. All crypto operations go directly to public blockchain nodes or API services. Tangem doesn't collect user data like IPs, addresses, balances, transactions, etc. We also don't provide KYC services — your wallet, your business!
Simplicity
The Tangem wallet offers a remarkably user-friendly experience, combining cutting-edge technology with intuitive design. Its quick setup, easy interface, and seamless crypto management process make it an accessible choice for seasoned cryptocurrency enthusiasts and beginners.
- Portable: The Tangem Wallet is a small credit card-shaped device. It fits in the pouch where you usually keep your bank card, making it easy to carry anywhere. It uses NFC protocol: no need to have wires or batteries for charging.
- Durable: The wallet is made from a durable plastic that can withstand everyday wear and tear. It is a chip with an antenna with no points of vulnerability or elements prone to failure.
- Convenience: The Tangem wallet is easy to use and set up. Just tap the card on your phone, enter your passcode or face ID, and access your crypto. Wallet setup also takes 3 minutes.
- Multi-currency support: The Tangem wallet supports many cryptocurrencies, including Bitcoin, Ethereum, and Litecoin.
- User-friendly interface: The Tangem app has a user-friendly interface that makes it easy to use, even for beginners.
- Support: Tangem now offers 24/7 support.
Overall, the Tangem wallet is a secure and user-friendly choice for individuals and businesses looking to store their digital assets securely. If you are looking for a safe and user-friendly hardware wallet, the Tangem wallet is a good option.
How to get started with Tangem Wallet
For Tangem Wallet to work, you need a phone that supports NFC and the official Tangem app. You can get the Tangem app from the App Store and Google Play.
To set up your Tangem Wallet, follow these instructions:
- Open the Tangem app.
- Tap Scan and scan the card by bringing it close to your smartphone.
- Select Create Wallet and scan the card again.
The tangem card then generates the keys and creates the wallet. The wallet will then ask you to create a backup.
You can back up your keys to two other blank Tangem Wallet cards. Please note that you can either create a backup now or later.
If you add one backup card now, however, you won’t be able to add more backup cards later. To start the backup process:
- Select Back up now.
- Tap Add a backup card.
- Scan the second card by tapping it on your smartphone.
- Repeat the last backup process for the third card (if available).
- Tap Finalize the backup process.
To protect your Tangem cards, you must create an access code.
- Tap Continue and enter an access code.
The access code can be any word, phrase, or number.
You can set a unique access code for each card later.
- Select Continue.
- Re-enter your access code.
- Tap Submit.
- Scan all the cards one by one again.
Here is a video that shows you how to set up your Tangem Wallet
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