Store your keys Store your public keys on your finger.Always have them with you when you need them.Unlock your Smart phone or tablet Now when you take your phone out of your pocket just slide your hand under and the NFC Ring will unlock it.It couldn't be more simple!The NFC Ring comes with two inlays, public and private so you can keep private information hidden in the palm of your hand.Want to be able to use your ring to open your house?Just grab yourself an NFC enabled door lock install it and your NFC Ring will work with it.Share & Transfer information You can use your NFC Ring to share Wifi information, links to websites, links to pictures, contact information or whatever you think is suitable to be passed securely to your friends smartphones and tablets.You can also use your NFC Ring to start apps with custom settings(parameters) which makes it a really easy way to personalize the app experience to match your ring.No charging required The NFC Ring never needs charging, ever.

NewsBTC Pakistan is proud to introduce the bitcoin NFC Wallet Card NFC: To understand the purpose of this card we need to first understand NFC.According to Wikipedia Near field communication (NFC) means near field communication or radio communication over short distances, but has come to be used in most cases for a specific set of protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone,to establish connection with other device by bringing them closer together and transferring data.Bitcoin NFC Wallet Card: The idea was conceived by us to provide our users free of cost these reprogrammable nfc chip based cards which can be programmed to their liking.There are many case scenarios that you can use but the one we will cover here is the way to put your bitcoins on it or use this card as a merchant.Ledger sells this same cards for 29.00 € and calls it a java card running fidesmo platform which is open source and can be implemented here.

Bitcoin NFC wallet card can be used with bitcoin android based wallets such as ones provided by Mycelium and Blockchain.info.Since we want our users to be creative we have used top of the line NFC chip with 10000+ write cycles and a capacity of  888 bytes.To receive this card free of cost please share this article publicly on your facebook, and make a comment on this post that you would like one.We will pick 50 random winners who will receive the card free of cost.How To Use The Card: This is pretty easy.You can simply use any nfc enabled mobile.Goto Play store and download “NFC tag writer” Launch the application on NFC enable mobile/tablet and tap on “write tags” option.Now there are multiple ways you can write the tags.Either you can create a “new dataset” or you can simply scan the qr code containing your wallet address from”copy QR code”.If you are creating a new dataset, create it as a “link”.Under ‘URI type’ select ‘URI (e.g.ftp, news, telnet, …)’ from the drop-down menu.

Enter the URI in this format; bitcoin: “your wallet address goes here” You can enter the description as you like and tap on “save & write” button.Tap the card with your mobile device to begin writing.you have successfully created a physical bitcoin wallet that you can carry in your pocket.bitcoin founder syriaOnce your wallet address is written on NFC tag you can simply tap it with the mobile device that have any bitcoin wallet installed to make a transfer.bitcoin app osxYou can also format the card by going to “erase tags” option under the app and delete you previous addresses and write new addresses on the same card.ethereum decentralizedIn the end we would like to thank our sponsors who have been kind enough to help us bring this card to you free of cost.cách kiếm bitcoin nhanh

First and foremost we thank Mr Haidar M Maccawala of yourstore.pk to be the first eCommerce store in Pakistan to embrace bitcoin into his system and bringing buying and selling of hard to find products. for their support, a true pioneer in supplying rugs, carpets and leather jackets worldwide and paid with bitcoin.bitcoin caida 2017Lastly Paybill.io is appreciated for its support on covering shipping of the card to the end users free of cost, a truly unique platform for bill payments in bitcoin starting with Pakistan.bitcoin sdk android bitcoin nfc blockchain cordova android btc commits branches releases Fetching contributors Latest commit 49e1103 Dec 26, 2016 Download Known Bugs 1.After the NFC tag is written, alert the user to stay away from the bug [There is a bug after you write the tag, the nfc provider should deregister itself for few seconds] The problem can be fixed in many ways - see github issues for the full discussion :) The error happens also on very bad networking, but it's usually a rare occasion.

New empty tag > OK (Send) - The focus should happen on the field!UX problem (now it requires 2 click to select the field, it should automatically .focus() when the [OK] button from the popup has been pressed) 3.Save the phone wallet private key in the device Save the phone wallet private key in the device, instead that in localStorage (in the app data), otherwise if you uninstall the app, your private key is lost!4. see github issues for more Please report as many bugs as you can, we'll try to fix them asap (remember we can't publish a new version until the hackathon is finished) For other known bugs - see the Github Issues section Moar Features Better errors > show confirmation count (e.g.in sweep) Ability to Copy (Clone the tag) (Backup) Settings > Denominations (other than millibits: BTCs, bits) Settings > Export private key support for other cryptocurrencies whitelabel version BIP38 version HD Wallet version embed link to url as other NFC record or dedicated url like bitnfc:// or bitcoin://import/pvtkey integrate qr.js library scan qr code to send payment export private key via SMS !!!

<<<< this is awesome use password protected nfc tokens use BIP38 password protected private keys embed the link for the app copy tag (clone tag) you name one!Development Prerequisites You need Android Studio SDK with SDK v.22 Install download the project (or git clone it) enter the dir or NFC Format SMS (the only one that is copy-pastable) This is the format we are using to encode the tag with: (we chose sms url) sms:0?body=privateKey It's actually an SMS format: Does it resemble something? it's: sms:URL that like an url has variables sms:path/?var=foo on standard Mifare tags usually there is space for another NFC Record we can also embed a link to the app's google play store page so an user can just scan the nfc tag, click & download :) Release Create a keystore (only the first time): keytool -genkey -v -keystore BitNFC.keystore -alias BitNFC -keyalg RSA -keysize 2048 -validity 10000; build the project in release mode: cordova plugin rm org.apache.cordova.console && cordova build --release android sign the two apk generated: jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore BitNFC.keystore platforms/android/build/outputs/apk/android-x86-release-unsigned.apk BitNFC && jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore BitNFC.keystore platforms/android/build/outputs/apk/android-armv7-release-unsigned.apk BitNFC use zipaling to slim the apks: zipalign -v 4 platforms/android/build/outputs/apk/android-x86-release-unsigned.apk BitNFC-x86.apk && zipalign -v 4 platforms/android/build/outputs/apk/android-armv7-release-unsigned.apk BitNFC-armv7.apk Unlincensed under #The_Unlicense Terms of Use Prior to using our wallet software, you acknowledge and agree that: Bitcoin is a dynamic digital currency, and there may be risk of loss when trading, holding, and transacting with bitcoin.