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p(x)Card

The most affordable cold wallet for all

Introduction

p(x)Card is a self-custody hardware wallet card that supports micropayments using multiple blockchain networks, including Ethereum, BNB Smart Chain, FXCore, Polygon, Avalanche C-Chain, and more. The key feature of p(x)Card is to securely create, store the user's private key and sign the transaction of the digital assets. The card itself is your private key.
p(x)Card is built upon Infineon technologies SECORA™ Blockchain security solution and Function X network infrastructure. This hardware wallet card allows users to have their own physical private key, pay/buy cryptocurrencies, and verify NFT directly through the p(x)Change app on XPOS. XPOS is the world's first blockchain-based Android point-of-sale smart device developed by Pundi X Labs, now available in over 30 countries.
Users can also manage the fund stored in p(x)Card via NFC pairing with p(x)Card app. Built with security in mind, p(x)Card makes it easier for crypto newbies to manage and reduce the risks of using their digital assets.

Security

p(x)Card equips with Infineon’s field-proven security chip featuring Integrity Guard security technology. It supports Global Platform Secure Channel Protocol 03 (SCP03) for secure authentication and encrypted communication. SCP03 provides three levels of security:
1. mutual authentication among p(x)Card, p(x)Change app and XPOS devices;
2. Data integrity;
3. Data confidentiality to prevent unauthorized parties from accessing data that is being transmitted.
To ensure that p(x)Card is the only place to hold the private key, its private key cannot be exported or otherwise accessed. Loss or physical destruction of the p(x)Card is equivalent to the loss of wallet funds or digital assets stored in the wallet. The private key is generated by the card and cannot be exported in order to reduce the risks of leaking the private key in an online environment.

Reliability

The security controller HW of p(x)Card is certified to the Common Criteria EAL6+ level—the same level of protection as the chip used in passports, it is dust, water, and hacker resistance. The card operates reliably in temperatures between -25°C (-13.°F) ~ +85°C (+185°F)

FAQ

1. What is p(x)Card?

p(x)Card is a self-custody hardware wallet that can securely create and store its own private key. Users can use p(x)Card to authorize crypto payment via the p(x)Card app, XPOS or p(x)Change, the noncustodial point of sale platform.

2. Where is p(x)Card’s private key stored?

The wallet key is generated and stored on the card. It cannot be exported afterward. To send tokens or NFTs from p(x)Card, you will need your card connected to it.

3. What happens if I lose p(x)Card?

For easy management, p(x)Card allows connecting 1 card to a single wallet address.
To protect your wallet from unauthorized access, in the future update, you can also set a pin code for your card via p(x)Card app. If you forget the access code, you can reset it with your PUK code. However, if you lose your PUK code or your card, you won't be able to access the assets stored in the p(x)Card wallet address.

4. Which digital assets and blockchains are supported by p(x)Card?

Ethereum
ETH
ECDSA
secp256k1
+ All smart contacts, including ERC20, ERC721, and other tokens
Function X
FX
ECDSA
secp256k1
+ All smart contacts, including ERC20, ERC721, and other tokens
Pundi X
PUNDIX
ECDSA
secp256k1
​
Polygon
MATIC
ECDSA
secp256k1
​
BNB Smart Chain
BNB
ECDSA
secp256k1
+ All smart contacts, including ERC20, ERC721, and other tokens
Avalanche
AVAX
ECDSA
secp256k1
Only C-Chain
​
​
​
​
​

5. How to send digital assets in p(x)Card to other blockchain addresses?

  • Download and install p(x)Card app to an NFC-enabled smartphone.
Currently, p(x)Card app is available on Google Play Store only.
  • Tap p(x)Card to the back of your phone, with the p(x)Card app on the screen.
  • Choose a blockchain network and the token you want to send
  • Enter the address and the token amount
  • Authorize the transaction

6. How to deposit crypto in p(x)Card?

Deposit via XPOS
  • The merchant clicks "Crypto Sales" on their XPOS
  • Choose the blockchain network and the tokens that the p(x)Card user wants to deposit
  • Enter the amount
  • The merchant enters the password to authorize the transaction.
  • Tap p(x)Card to XPOS
  • Wait till the confirmation notification appears and print the receipt
Deposit without XPOS
  • Download and install p(x)Card app to an NFC-enabled smartphone.
Currently, p(x)Card app is available on Google Play Store only.
  • Tap p(x)Card to the back of your phone with the p(x)Card app on the screen.
  • Choose the blockchain network and the token you want to receive
  • Click copy the address and share the address with the sender
  • The sender enters the p(x)Card address and sends the tokens

7. How to make crypto payments via p(x)Card?

Pay via XPOS
  • XPOS merchant clicks "Cashier Pro"
  • Choose the blockchain network and the tokens that the p(x)Card user wants to pay/send
  • Enter the amount of Fiat or crypto
  • Choose "Swipe card" to pay
  • Tap p(x)Card to XPOS, wait till the confirmation notification appears and print the receipt
Pay without p(x)Change app
  • Download and install p(x)Card app to an NFC-enabled smartphone.
Currently, p(x)Card app is available on Google Play Store only.
  • Open p(x)Card app, click "accept and agree the terms of use" and then tap "Connect My p(x)Card"
  • Tap p(x) Card to the back of your phone to pair it with the app.
  • Choose the blockchain network on the top and ..the token you want to pay
  • Ask for the Merchant's wallet address that supports receiving the tokens and show the address' QR code
  • p(x)Card owner uses p(x)Card app to scan the QR code or paste the address in the field, and then enter the amount to pay. Please make sure you enter the correct address.
  • p(x)Card owner confirms the transaction details. Wait for the confirmation notification from the merchant. The merchant will print the receipt.

8. What is p(x)Card app?

The p(x)Card app supports p(x)Card asset management by taping the card to users' NFC-enabled phones. It offers the interface for users to retrieve the wallet address of p(x)Card and to view the digital assets stored inside the card.

9. What can I do with p(x)Card App?

p(x)Card app allows you to manage and transfer cryptocurrency and NFTs on f(x)Core, Ethereum, Binance Smart Chain, Polygon, and Tron. Additionally, it offers the setting to view the digital assets in the value of fiat currency of your choice.