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paste.cjc.im

Aug 02, 2020

It's been a while again!

I've been working on the same side-project (onlooker) for over a year, and had the desire to make something else.

In a virtual hack-a-thon I have created paste.cjc.im[1] which is a simple pastebin-style tool.

1: https://paste.cjc.im

What makes this different from others is:

• Data is encrypted using the browser's crypto module using AES-CBC
• The "paste" is stored in the anchor of the URL, and thus never gets sent to the server. (This was partially a feature, and partially so I don't have to run any sort of storage or API 👍)

For example this[2] has the key "superSEKRETkey"

2: https://paste.cjc.im/#eyJkYXRhIjoi0q9cdTAwMTHnXHRH5ld/e5fIXGbo7PpU/alBQTRcdKDoO0MkkO/6jCIsIml2Ijoi/mtWmadcXKBw3mIsa046npQifQ==

The anchor part of the URL contains a javascript object encoded in base64 that contains the ciphertext and the initialisation vector.

As part of this I also put together qr.cjc.im[3] that can encode a paste into a single QR code for sharing in meatspace, the same paste as above:

3: https://qr.cjc.im

QR Code example [IMG]

👋

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