A858 - The Most Mysterious Subreddit

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Published 2021-01-29

A858 is a mysterious subreddit made in 2011 posting strange hexadecimal sequences multiple times per day. The mystery gets stranger after the user behind it starts giving small pieces of information about the project through heavily encrypted code. The a858 mystery has been around for almost 10 years now, and the true meaning is still shrouded. The cryptography displayed is seemingly very hard to solve, but I hope that some attention can be brought back to this subreddit and mystery so that it may become solved.
A858 - The Most Mysterious Subreddit

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0:00 Intro
0:47 The Story
6:20 Theories

All Comments (21)

@tesiaw6229 3 years ago

me generating strong passwords and then dumping them in random subreddits so I don’t forget them
@mising0px 3 years ago

Imagine if after you decrypted all the messages, it creates a youtube link that leads to a Rickroll
@L3alwa 3 years ago

"We've been trying to reach you about your car's extended warranty"
@markdobbins1622 3 years ago

it's probably just a company testing how secure their encryption is
@fleeb7 3 years ago

imagine after decrypting them for a long time you’d get: “the cashier just gave me a cheeseburger instead of a big mac”
@R33fth3b33f 3 years ago

mysteries like this are usually some MIT or Harvard college student making a thesis paper
@zavodszkiabel7919 3 years ago

'Mom, can we have Cicada 3301?' 'We have Cicada 3301 at home' Cicada 3301 at home:
@PuffleBuns 3 years ago

A failed ARG that the owner simply no longer wanted to continue sounds like a pretty solid explanation.
@XShrimpGodx 3 years ago

I think the sub's purpose was to test a new form of encryption, the posts that people were able to decrypt were most likely to maintain interest on the project.
@MiniMight 3 years ago

Is it just me or is YouTube pushing more quality channels with under 100k subs recently. Really nice to see
@TheGreatCalsby 3 years ago

Our elite team: MIT students with vast knowledge and expertise, Code-breaking hackers who can hijack any mainframe, and... regular redditors, I guess
@vanderkarl3927 2 years ago

Amazing... imagine working on a sequence for days on end and finally cracking it and it's just a variation on "Thanks for the gold, kind stranger!"
@woopslap 3 years ago

Can’t believe you’re so small, this is really well made.
@katiekawaii 3 years ago

I'm so mad that I watched this video. Now this is going to occupy my mind without any closure forever.
@psychxx7146 3 years ago

So that’s what the FBI’s recruitment process is like huh
@jamesmartin2648 2 years ago

I know am not suppose to post this here But Crypto currency is gradually moving towards something big and the price surge over the past few months is just the beginning of greater things to come. you got any advice for someone that is fresh to crypto. Don't know where to start..
@snoozley853 3 years ago

From disrupt, glad I've found this channel.
@rublaj 3 years ago

I just know that all these people trying to solve the mystery are now on the FBI watchlist.
@TheBooker66 2 years ago

To interested people: The subreddit is back to being posted to, but the original user has been replaced. This happened around two months ago.
@biboujkr 3 years ago

girls: we give the boys obvious signs but they just don't understand their signs: