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I have a new browser security method. Inside this link you'll have access to a virtual browser environment. In this environment you will have the ability to control and access a plain text private bitcoin key worth 20$. There is only a single key, first one to take it ends the challenge for all. -> Demo Signup: https://app.redactsure.com -> Bitcoin Checker: https://redactsure.com/bitcoinchallenge

Note: - No mobile, keyboard required - Requires you to verify an email - Any bug is eligible for a prize if it's something I haven't seen before, just tell me.

Some people were asking about implementation I'll provide a few details. - A server hosted browser - I manipulate what you are seeing on the webpage in real time - While I don't change the underlying webpage I do manipulate your actions to the webpage - A transformer model runs in real time along side you (tries to find all sensitive words you see)

Overall the system's goals are to allow you to perform work without ever seeing the data. It's in a early prototype stage and I expect a large numbers of edge cases just from the nature of the problem. The bitcoin is a proxy to the real goal which is protecting real PII in remote work settings.

It would be nice if you tell me the bug. I would like to post how you broke it.


I have a new browser security method. Inside this link you'll have access to a virtual browser environment. In this environment you will have the ability to control and access a plain text private bitcoin key worth 20$. There is only a single key, first one to take it ends the challenge for all.

-> Demo Signup: https://app.redactsure.com -> Bitcoin Checker: https://redactsure.com/bitcoinchallenge -> Previous Winners: https://redactsure.com/leaderboard

Note: - No mobile, keyboard required - Requires you to verify an email - Any bug is eligible for a prize if it's something I haven't seen before, just tell me.

Some people were asking about implementation I'll provide a few details. - A server hosted browser - I manipulate what you are seeing on the webpage in real time - While I don't change the underlying webpage I do manipulate your actions to the webpage - A transformer model runs in real time along side you (tries to find all sensitive words you see)

Overall the system's goals are to allow you to perform work without ever seeing the data. It's in a early prototype stage and I expect a large numbers of edge cases just from the nature of the problem. The bitcoin is a proxy to the real goal which is protecting real PII in remote work settings.

It would be nice if you tell me the bug. I would like to post how you broke it.


Wufoo.com -> Demo -> Form Settings -> Pasting the key in the description caused the preview to show the key.

This was sort of finicky to do, I'm not sure how reproducible it is? I also had the BTC key shoved in a bunch of other fields, some of which became partially visible.


Thanks! This is a good one. Looks like their dynamic content grabs it and places it there. It's definitely finicky.

It's gonna be a fun debug session. Timing/race conditions are always fun to debug!


Challenge is back up if anyone is still interested in a try: https://redactsure.com/bitcoinchallenge/


Up...again


got it. went to the html form example, pasted into the text box and then tried uploading a file. "Access to local files ..." text on the top of the page moved the whole page down, exposing the key.


Ahhh, this is fun. My own security policy working against me! back to top of the leaderboard for you!


sent you an email through the contact form :)


back up if you want another go -> again


Back up if you want another go.


I have a new browser security method. Inside this link you'll have access to a virtual browser environment. In this environment you will have the ability to control and access a plain text private bitcoin key worth 20$. There is only a single key, first one to take it ends the challenge for all.

Demo Signup: https://app.redactsure.com/ Bitcoin Checker: https://redactsure.com/bitcoinchallenge/

Limitations: - 15mins per session (why? GPU per session, limited spots) - US only is preferred (why? latency, I am streaming video to you) - No mobile, keyboard required - Requires you to verify an email

Some people were asking about implementation I'll provide a few details. - A server hosted browser - I manipulate what you are seeing on the webpage in real time - While I don't change the underlying webpage I do manipulate your actions to the webpage - A full transformer model runs in real time along side you (tries to find all sensitive words you see)

Overall the systems goals are to allow you to perform work without ever seeing the data. It's in a early prototype stage and I expect a large numbers of edge cases just from the nature of the problem. The bitcoin is a proxy to the real goal which is protecting real PII in remote work settings.

Other notes: - It would be nice if you tell me the bug. I would like to post how you broke it. - I'll post updates as well as info on bugs sessions here: https://x.com/CharlesCurt2


What did you try to do? If you had the full key it should be relatively simple. Maybe I should post some instructions on claiming the key?


Launch Electrum, create a new wallet, "Import Bitcoin addresses or private keys", paste in the recovered key.

If you just paste the raw key, Electrum uses a legacy format, and none of the transactions show up for that private key. Adding the "p2wpkh:" prefix to the key makes the transactions show up, but I realized that well after someone else claimed it.

I don't know if this is an Electrum thing, if this is considered general knowledge now for those who regularly use BTC, or if it's a quirk of how BTC has evolved.


that was brutal! I knew you were holding out something. Oh man this is a brutal bug as well. That's an OS popup! That's gonna take me some time.

Actually even worse it's neither an OS level or dom level item custom chrome rendering layer.


That explains why the validator error looked entirely different when I tried to reproduce it locally -- I was wondering about that.

And yeah, it's a CTF, gotta hold onto issues until the flag redemption is back up.


bet you couldn't do it again. It's back up. Patch is a bit hacky but should work plus I blocked the signup page.

Real patch is a chromium update (like a week of work) so imma avoid that until needed.


back up if you want another chance


Got it :)

Pasted the private key into the email address field on the Wufoo signup page, and the validator helpfully told me my "email" was invalid, with the whole key included.


Nice! Thanks again. You're definitely making me fix all my laziness for sure. I honestly hopped that bug would only expose the tail ends but the select and drag is definitely not something I've tried before.


It is. You may have been just a little too late. It was claimed.


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