45 lines
2.6 KiB
Markdown
45 lines
2.6 KiB
Markdown
---
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title: My weird piece of EDC
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description: Reasons why I always carry NFC cards with me
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date: 2019-08-10
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tags:
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- random
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aliases:
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- /blog/2019/08/10/why-i-carry-nfc
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- /blog/why-i-carry-nfc
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---
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Im back with a quick little post about something I cary with me everywhere I go, EDC (Every-Day Carry) if you will.
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## How this started
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Earlier this year, my friend @hyperliskdev showed me a piece of "fake ID" he was given as a joke. After some experimentation, he noticed that, upon tapping it to his phone, he would get an error message about an un-formatted card.
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After hearing of this, I opened up [NFC Tools](https://play.google.com/store/apps/details?id=com.wakdev.nfctools.pro) on my phone and started playing. We had quite some fun with [various settings and data](#shenanigans), and I decided that I wanted a card too. I send a message to someone that I knew worked with these, and got myself 4 to play with.
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## Shenanigans
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Upon figuring out how to write to @hyperliskdev's card, we started out simple. We sent bits of text to eachother, and I eventually sent him a copy of my contact information, and bitcoin address. Then, came the real fun..
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By setting the data type to `external link`, and the content to [this totally not suspicious URL](https://www.youtube.com/watch?v=dQw4w9WgXcQ), we now had the perfect tool for derailing a lesson. An automatic [Rick Roll](https://en.wikipedia.org/wiki/Rickrolling) card. Upon tapping this card to a phone, the youtube app would auto-play *Rick Astley's Never Gonna Give You Up*. After this discovery, people started asking to buy pre-configured cards from me :laughing:.
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After this came even more fun ideas:
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- Enabling flashlights
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- Rebooting phones
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- Calling phone numbers
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- Sending texts
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- Filling phones with fake contacts
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## Practical use
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I don't actually carry my cards around for messing with people but instead, use them for things like:
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- Cloning hotel access cards (being in a room of 4 with only 2 cards)
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- Creating login cards for school printers (so I don't have to log in manually)
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- Sharing small amounts of data and links between phones
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- Giving my contact info to people
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Thanks to the NFC Tools app, pretty much everything is 3 taps and a swipe away. I strongly recommend picking up some cards for yourself if wou work with a large number of NFC-compatible systems.
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## A/N
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Occasionally, I either have nothing in the works, or am working on some very boring and technical projects, so I look to post some fun content like this. Currently the latter of the options is true, and I wanted a quick break from writing networking code.
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Let me know what you think of this type of content!
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