Little Brother - Cory Doctorow (life books to read txt) 📗

pranking. The Pirate Party had pretty good filters, though, and they gave anyone who wanted it 500 gigabytes of email storage, so I wasn't likely to be drowned any time soon.

I filtered it all out, hammering on the delete key. I had a separate mailbox for stuff that came in encrypted to my public key, since that was likely to be Xnet-related and possibly sensitive. Spammers hadn't figured out that using public keys would make their junk mail more plausible yet, so for now this worked well.

There were a couple dozen encrypted messages from people in the web of trust. I skimmed them -- links to videos and pics of new abuses from the DHS, horror stories about near-escapes, rants about stuff I'd blogged. The usual.

Then I came to one that was only encrypted to my public key. That meant that no one else could read it, but I had no idea who had written it. It said it came from Masha, which could either be a handle or a name -- I couldn't tell which.

M1k3y

You don't know me, but I know you.

I was arrested the day that the bridge blew. They questioned me. They decided I was innocent. They offered me a job: help them hunt down the terrorists who'd killed my neighbors.

It sounded like a good deal at the time. Little did I realize that my actual job would turn out to be spying on kids who resented their city being turned into a police state.

I infiltrated Xnet on the day it launched. I am in your web of trust. If I wanted to spill my identity, I could send you email from an address you'd trust. Three addresses, actually. I'm totally inside your network as only another 17-year-old can be. Some of the email you've gotten has been carefully chosen misinformation from me and my handlers.

They don't know who you are, but they're coming close. They continue to turn people, to compromise them. They mine the social network sites and use threats to turn kids into informants. There are hundreds of people working for the DHS on Xnet right now. I have their names, handles and keys. Private and public.

Within days of the Xnet launch, we went to work on exploiting ParanoidLinux. The exploits so far have been small and insubstantial, but a break is inevitable. Once we have a zero-day break, you're dead.

I think it's safe to say that if my handlers knew that I was typing this, my ass would be stuck in Gitmo-by-the-Bay until I was an old woman.

Even if they don't break ParanoidLinux, there are poisoned ParanoidXbox distros floating around. They don't match the checksums, but how many people look at the checksums? Besides me and you? Plenty of kids are already dead, though they don't know it.

All that remains is for my handlers to figure out the best time to bust you to make the biggest impact in the media. That time will be sooner, not later. Believe.

You're probably wondering why I'm telling you this.

I am too.

Here's where I come from. I signed up to fight terrorists. Instead, I'm spying on Americans who believe things that the DHS doesn't like. Not people who plan on blowing up bridges, but protestors. I can't do it anymore.

But neither can you, whether or not you know it. Like I say, it's only a matter of time until you're in chains on Treasure Island. That's not if, that's when.

So I'm through here. Down in Los Angeles, there are some people. They say they can keep me safe if I want to get out.

I want to get out.

I will take you with me, if you want to come. Better to be a fighter than a martyr. If you come with me, we can figure out how to win together. I'm as smart as you. Believe.

What do you say?

Here's my public key.

Masha

When in trouble or in doubt, run in circles, scream and shout.

Ever hear that rhyme? It's not good advice, but at least it's easy to follow. I leapt off the bed and paced back and forth. My heart thudded and my blood sang in a cruel parody of the way I'd felt when we got home. This wasn't sexual excitement, it was raw terror.

"What?" Ange said. "What?"

I pointed at the screen on my side of the bed. She rolled over and grabbed my keyboard and scribed on the touchpad with her fingertip. She read in silence.

I paced.

"This has to be lies," she said. "The DHS is playing games with your head."

I looked at her. She was biting her lip. She didn't look like she believed it.

"You think?"

"Sure. They can't beat you, so they're coming after you using Xnet."

"Yeah."

I sat back down on the bed. I was breathing fast again.

"Chill out," she said. "It's just head-games. Here."

She never took my keyboard from me before, but now there was a new intimacy between us. She hit reply and typed,

Nice try.

She was writing as M1k3y now, too. We were together in a way that was different from before.

"Go ahead and sign it. We'll see what she says."

I didn't know if that was the best idea, but I didn't have any better ones. I signed it and encrypted it with my private key and the public key Masha had provided.

The reply was instant.

I thought you'd say something like that.

Here's a hack you haven't thought of. I can anonymously tunnel video over DNS. Here are some links to clips you might want to look at before you decide I'm full of it. These people are all recording each other, all the time, as insurance against a back-stab. It's pretty easy to snoop off them as they snoop on each other.

Masha

Attached was source-code for a little program that appeared to do exactly what Masha claimed: pull video over the Domain Name Service protocol.

Let me back up a moment here and explain something. At the end of the day, every Internet protocol is just a sequence of text sent back and forth in a proscribed order. It's kind of like getting a truck and putting a car in it, then putting a motorcycle in the car's trunk, then attaching a bicycle to the back of the motorcycle, then hanging a pair of Rollerblades on the back of the bike. Except that then, if you want, you can attach the truck to the Rollerblades.

For example, take Simple Mail Transport Protocol, or SMTP, which is used for sending email.

Here's a sample conversation between me and my mail server, sending a message to myself:

HELO littlebrother.com.se

250 mail.pirateparty.org.se Hello mail.pirateparty.org.se, pleased to meet you

MAIL FROM:m1k3y@littlebrother.com.se

250 2.1.0 m1k3y@littlebrother.com.se... Sender ok

RCPT TO:m1k3y@littlebrother.com.se

250 2.1.5 m1k3y@littlebrother.com.se... Recipient ok

DATA

354 Enter mail, end with "." on a line by itself

When in trouble or in doubt, run in circles, scream and shout

.

250 2.0.0 k5SMW0xQ006174 Message accepted for delivery

QUIT

221 2.0.0 mail.pirateparty.org.se closing connection

Connection closed by foreign host.

This conversation's grammar was defined in 1982 by Jon Postel, one of the Internet's heroic forefathers, who used to literally run the most important servers on the net under his desk at the University of Southern California, back in the paleolithic era.

Now, imagine that you hooked up a mail-server to an IM session. You could send an IM to the server that said "HELO littlebrother.com.se" and it would reply with "250 mail.pirateparty.org.se Hello mail.pirateparty.org.se, pleased to meet you." In other words, you could have the same conversation over IM as you do over SMTP. With the right tweaks, the whole mail-server business could take place inside of a chat. Or a web-session. Or anything else.

This is called "tunneling." You put the SMTP inside a chat "tunnel." You could then put the chat back into an SMTP tunnel if you wanted to be really weird, tunneling the tunnel in another tunnel.

In fact, every Internet protocol is susceptible to this process. It's cool, because it means that if you're on a network with only Web access, you can tunnel your mail over it. You can tunnel your favorite P2P over it. You can even tunnel Xnet -- which itself is a tunnel for dozens of protocols -- over it.

Domain Name Service is an interesting and ancient Internet protocol, dating back to 1983. It's the way that your computer converts a computer's name -- like pirateparty.org.se -- to the IP number that computers actually use to talk to each other over the net, like 204.11.50.136. It generally works like magic, even though it's got millions of moving parts -- every ISP runs a DNS server, as do most governments and lots of private operators. These DNS boxes all talk to each other all the time, making and filling requests to each other so no matter how obscure the name is you feed to your computer, it will be able to turn it into a number.

Before DNS, there was the HOSTS file. Believe it or not, this was a single document that listed the name and address of every single computer connected to the Internet. Every computer had a copy of it. This file was eventually too big to move around, so DNS was invented, and ran on a server that used to live under Jon Postel's desk. If the cleaners knocked out the plug, the entire Internet lost its ability to find itself. Seriously.

The thing about DNS today is that it's everywhere. Every network has a DNS server living on it, and all of those servers are configured to talk to each other and to random people all over the Internet.

What Masha had done was figure out a way to tunnel a video-streaming system over DNS. She was breaking up the video into billions of pieces and hiding each of them in a normal message to a DNS server. By running her code, I was able to pull the video from all those DNS servers, all over the Internet, at incredible speed. It must have looked bizarre on the network histograms, like I was looking up the address of every computer in the world.

But it had two advantages I appreciated at once: I was able to get the video with blinding speed -- as soon as I clicked the first link, I started to receive full-screen pictures, without any jitter or stuttering -- and I had no idea where it was hosted. It was totally anonymous.

At first I didn't even clock the content of the video. I was totally floored by the cleverness of this hack. Streaming video from DNS? That was so smart and weird, it was practically perverted.

Gradually, what I was seeing began to sink in.

It was a board-room table in a small room with a mirror down one wall. I knew that room. I'd sat in that room, while Severe-Haircut woman had made me speak my password aloud. There were five comfortable chairs around the table, each with a comfortable person, all in DHS uniform. I recognized Major General Graeme Sutherland, the DHS Bay Area commander, along with Severe Haircut. The others were new to me. They all watched a video screen at the end of the table, on which there was an infinitely more familiar face.

Kurt Rooney was known nationally as the President's chief strategist, the man who returned the party for its third term, and who was steaming towards a fourth. They called him "Ruthless" and I'd seen a news report once about how tight a