Spy Vs Spy Game Online Free On Playretrogames#

I didnt know there was a newer version than the NES. I loved that game so much. I also thought of the NES game when I read Spy vs Spy. Spy for the NES back in the late 1980s. I remember playing Spy vs.

Spy Vs Spy Game Online Free On Playretrogames

Welcome to SCIENCE FRIDAY.WAYNER: Well, you know, it turns out there are lots of little corners in all the information we see. He's author of the book 'Disappearing Cryptography: Information Hiding: Steganography & Watermarking,' now in its third edition. But how do they do that? Well, joining me to talk about it is Peter Wayner. It was added on and has been played 141 times.It's called steganography, hiding one piece of information inside of another, and it's a common practice. Currently, a demo has been released with Scout, Demoman and Spy.Spy vs Spy is a Game Boy Color game that can be played here for free on playretrogames.online using your web browser. In the mod, Boyfriend rap battles against all 9 playable classes.

And then if you do that enough times, you can send a signal, and then the computer can piece it all together into a complex message.FLATOW: So you mean if you - I remember in the old days of computing, way back before there were mice and things, that's how old I am, you used to be able to take a file and read the contents of the file with a text reader and see all the numbers and symbols and things that made up, let's say, the picture file. You can make a color just a little bit more blue, or you can make it a little bit more red. We kind of go in, and we exploit things. If you don't type in the right URL, it gets upset.But it turns out that there's lots of little wiggle room that we don't even realize is there, and that's what steganography uses. You don't type in the right password, the computer gets upset.

It's almost a little bit too perfect, you might say.And then the statistics comes out, and it says oh, well, you know, it gives you a number, and the number is over a threshold, and you say oh, that's an alarm bell, and I'll look at it.FLATOW: It must be an interesting history to this whole steganography idea.WAYNER: Yeah, people certainly have been playing around with this for, you know, thousands of years. But it goes through the file, and it looks, and it kind of sees that - you could say the noise in the image is not right, and often it's a little too random. You know, it's kind of a little bit like the whole money ball argument that we hear about baseball. What's a little bit fascinating about steganography, and what's kind of different from some of the other ways we have of communicating, is that there are these kind of greater statistical techniques that you can use that give you, kind of, an indication that maybe there's something that's hidden there.And you might be able to figure out what the message is, but can tell that something's just not right with this file.FLATOW: And you can do that just out of a gut feeling, or experience or cracking the file? Or how does that work?WAYNER: Well, it uses statistics. So is it really always staying one step ahead or one step behind of your opposition?Yeah, now, both sides of the communication have to know that the technique is there, and that way, you know, if you're sending a message, the person who's receiving it has to know where to look and how to look for it. You don't really notice it.Now, the bad guys must know that you know this technique that they may be using.

It goes back to the Greeks, and it basically means hidden writing. Can you take that apart for us?FLATOW: Stega-, sounds almost like a dinosaur.WAYNER: Certainly. Or they might change, you know, put little changes just in case someone was trying to sneak a message in, you know, some table of data.FLATOW: So what's the difference between steganography and - I'm interested in the origin of the word steganography. And in fact, I mean, the story that's floating around, and I'm not sure if it's true or not, I haven't been able to dig deep enough to find out, is that during World War II, the censors would go through, and they would kind of change numerical tables.So if somebody was sending a letter to someone in the theater and saying, you know, Johnny got good grades, got an A, B, a C or something like that, they might change them around a little bit. I mean, personally I was kind of inspired by an Edgar Allan Poe short story, 'The Purloined Letter,' and that's when I started to think about how you could do it mathematically.But, you know, people have been, you know, taking this approach for a long time.FLATOW: I notice that you might be able to - I think the Romans shipped apparent black wax tablets, and then you scrape off the wax, something's in there.WAYNER: Oh sure, there are lots of different ways you could do this.

I mean, obviously any time you want to communicate with someone in a secret way, you know, it may or may not be legitimate. The way I like to explain it is I said, you know, encryption is building the safe, and steganography is trying to find a painting to hide the safe behind.FLATOW: Interesting, and there must be not-sneaky reasons why you would use steganography.WAYNER: Yeah, there are plenty of reasons. What is the difference between steganography and encryption?WAYNER: Well, you know, there's a lot of overlap, and the scientists like to kind of parse things and make distinctions.

It's called 'How to Hide Online.' And it's a simpler version.I mean, it's just - it has some basic text, and then all the illustrations are interactive. I wrote 'Disappearing Cryptography' a while ago, but I put together an iPad version of it, and it's, you know, just started - just reached the iPad store the last week or so. Is there an app for that, that you can sort of make your own, see how it works?WAYNER: I mean, I just put together a book. And what I've also found is that when you deal with programming, it turns out steganography is very useful because it allows you kind of add an additional layer or features or data without breaking the old software that was out there.So the old software just deals with the data as if this steganographic message wasn't there, but the new software can come along, and it can look in the corners, and it can find it, and they can work side-by-side.FLATOW: It would be fun, you know, to experiment and fool around with steganography. And they operate the same way that the government puts all the little secret - little secret signals in cash or the way that people who try to thwart counterfeiters that way.WAYNER: Yeah, watermarks, exactly, and then, you know, obviously the content industry is very interested in watermarking because they have hope that this might be able to allow them to, kind of, combat piracy. It's a good way for combating counterfeit.And there are these kind of numerical ways that you can go, and you can hide - you know, you can hide check digits, or you can hide ways - signatures inside of files.

And so I think when I - the stories I read, a lot of them concentrated on just what was in these documents. One that does happen with sites like Flickr or with YouTube is that they try to use very advanced compression algorithms to make the files as small as possible.And the advanced compression can be your enemy if you're trying to send a secret message with steganography.FLATOW: What was it about this captured al-Qaida pornography video that got people's attention and that they thought there might be something in it?WAYNER: Well, I don't think that they have as much intelligence from al-Qaida as they would like. The Internet's a little bit spooky that way. But then I sent it a different way, and it went through fine. I just sent, I sent a file this morning, and it got munged(ph) , and it got messed up in some strange way.