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to continue watching this video prove that you are a human by clicking on

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every box that contains Aus who are we

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kidding we welcome all viewers organic or robotic here at Techquickie but back

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on topic odds are you've probably seen

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little tests like that scattered around the internet when you're trying to post

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a comment create an account or buy something they're called captas which

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stands for completely automated public Turing tests to tell computers and

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humans apart proving once again that the

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computer science Community continues to struggle with the concept of acronyms

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anyway the irony of using Computing

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techniques to trick other computers

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isn't really new le speak which goes all

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the way back to the early 1980s originated as a method of preventing

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content from being easily searchable and

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to work around obstacles like profanity filters a use that is still common to

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this day but modern capture didn't come

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around until the late 1990s when the

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then popular search engine altav Vista

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man I'm old was trying to find a way to

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prevent Bots or automated computer programs from adding tons of spam and

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malicious URLs to their link database

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they wanted to put some kind of barrier in place and approach the problem by

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thinking about something that both humans and computers were good at namely

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optical character recognition which you can learn more about here then

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introducing elements that made the task

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much more difficult for computers while keeping it fairly easy for humans and

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since computers of the day could only recognize clear easyto read text TT

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altavista's Engineers forced the user or

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the bot as it were to read a puzzle with

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distorted misaligned text with stray

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marks in order to submit a URL to the database cool right this form of capture

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continues to be quite popular along with

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audio capture for the visually impaired that in a similar vein typically

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includes spoken letters that are somewhat garbled to defeat autom ated

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sound analysis q

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y26 w you'll see it employed in

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situations ranging from preventing Bots

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from signing up for social media accounts to cut down on spam to

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verification on ticket buying websites to ensure that Bots working for ticket

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scalpers can't snatch up all the tickets to popular events you might even see

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captas more frequently if you're using a VPN service and as many website

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administrators are aware that vpns are a

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popular tool that scammers can use to conceal their identities so a request

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from a known VPN IP address is more

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likely to trigger a capture prompt but

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there's a bit more to it than simply presenting the scheming bot with a

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confusing image capture scripts also

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need to be written securely so that the correct answer is isn't available to the

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bot through a back door for example some

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capture scripts especially many freely available ones render the text on the

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user's computer instead of on the server and handle the answer in plain text

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meaning that a bot can be written to steal the answer without ever solving

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the puzzle but even if proper security is implemented Bots are also getting a

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lot more sophisticated than they used to be and greater processing power has

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enabled them to use machine learning to get better at solving these kinds of

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captas so everything from image recognition puzzles to trivia questions

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have been employed to stay one step ahead of the spam bot arms race but

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lonus what about those prompts that I've been seeing these days that just say I'm

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not a robot and then I just check a box I mean couldn't a robot do that how does

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that work well this is a pretty cool mechanism from Google called No capture

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it actually tracks your mouse movements right before you check the box humans

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tend to move their mice in Wiggly imperfect ways when they want to point

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at something whereas this behavior is usually absent with a bot no capture

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also looks at your IP address and cookie activity to see if it's probably

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consistent with a Human Instead of a bot

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and this automation has made it much faster and less frustrating for the user

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increasing its popularity it's generally regarded as reliable which is cool but

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back to that face I made before it has privacy Advocates concerned about how

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much information it's sending to Google and uh how exactly is it being

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used oh that Google but considering how many people

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see an opportunity to make a quick Buck by deploying spam Bots as the internet's

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influence continues to grow it isn't likely we'll see the human verification

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arms race cool down anytime soon I just

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hope that it doesn't reach the point where we have to submit like a DNA

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sample and like a stool sample just to downvote somebody on Reddit TunnelBear

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VPN vpns are great for more than just spammers and scammers by the way they

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are perfect for anyone who wants to use online services and browse the internet

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anonymously or to access things that just plain might not be available in

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their country tunnel bear has easy to use apps for iOS Android PC and Mac they

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also have a Chrome extension and it's so easy to use all you do is install it

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pick the country that you wish to be

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from and press a button when you do that

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two things happen one your connection gets get encrypted with AES 256-bit

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encryption and two your public IP address gets switched so you show up as

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though you are in a different country and tunnel bear lets you bypass all the

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BS that often comes with VPN use no DNS

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ports blah blah blah none of that stuff they've also got a top rated privacy

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policy and do not log user activity so

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try it out for nothing 500 megabytes free data no credit card required and

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when you go wow this is great I can watch that soccer game or I can buy that

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thing or whatever you can get an unlimited plan and save 10% by going to

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Tunnel bear.com Linus so thanks for watching guys like

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dislike leave a comment if you have a suggestion for a future video most of

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the suggestions are terrible but every once in a while a gem does come in so uh

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kudos for that and as always don't forget to subscribe for more videos just

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like this one