Cold Wallet
and
Payment SuperCard
Cold Wallet and Payment SuperCard
GRAFT cold wallet / payment card allows the same instant payment at the point-of-sale, but without the mobile phone app. Cold wallets are also safer for private key storage as they are not subject to malware on mobile phones.
* The ColdPay card is being developed in parthership with an innovative smart card manufacturer.
GRAFT is not planning (as of this time) to be in the card/wallet business. We’re partnering with a card manufacturer to build this as a reference card. This doesn’t preclude others from doing the same – in fact we would encourage that.
Features:
![](/wp-content/uploads/2018/09/cp-icon1.png)
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The battery in the ColdPay card is rechargeable with USB charger and lasts approximately 2.5 hours of continuous operation on a single charge.
Security:
![](/wp-content/uploads/2018/09/shield1.png)
![](/wp-content/uploads/2018/09/shield2.png)
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Cryptography:
Cryptography Key, with key generation: | DES (64, 128, 192 bits), AES (128, 192, 256 bits), ECC (256,384, 521 bits), RSA (512, 1024, 2048 bits) |
HMACSignature: | HMAC-SHA1,HMAC-SHA256,HMAC-SHA384,HMAC-SHA512 |
RSASignature: | RSA512,RSA1024,RSA2048 |
EllipticCurveSignature: | ECDSA(SECP256K1,SECP256R1,SECP384) |
EllipticCurveDiffieHellman: | ECDH(SECP256K1,SECP256R1,SECP384) |
Supported Type: | ALG_EC_SVDP_DH, ALG_EC_SVDP_DH_KDF, ALG_EC_SVDP_DH_PLAIN, ALG_EC_SVDP_DH_PLAIN_XY |
SymmetricCryptography: | DES,Triple-DES,AES |
Highlights:
All the transactions can be protected with a pin code and the card provides for interactive transaction acknowledgement.
![](/wp-content/uploads/2018/08/newcard2.png)
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The card is launched with support for GRFT at first, with support for alternative currencies made available at a later date.
When used for payments, GRAFT ColdPay Card provides extra layer of security prompting the user to acknowledge and verify the purchase.
![](/wp-content/uploads/2018/08/newcard-1.png)
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GRAFT ColdPay offers multiple options for usage – contact reader via chip (EMV), by NFC, or by having the merchant scan the QR code on the card (same QR scan can also work for person2person transfers)