WEBVTT

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when we visit a website that features that little padlock in the corner of our

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browser we're trusting it to keep our data safe and whether it's our credit

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card numbers sensitive work documents or those questionable photos that you told

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your friend not to take various types of encryption standards ensure that they

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are kept out of the prying hands of e

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Intruders Intruders whatever while they

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zip around on the internet but aside from the reassuring little icon on your

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computer screen what's actually going on what is encryption all right so while

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today's video focuses on encryption on the web specifically and the procedures

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used for encrypting data can be massively complex the fundamental idea

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behind all encryption is really quite simple whenever you transfer encrypted

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information your computer turns that data into an unintelligible mess or

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Cipher text that can only be put back into a readable form by unlocking it

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with a key of some sort that tells the receiving computer how to decode the

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incoming message this basic concept has actually been used to send secret

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messages since long before the invention of computers ciphers of various kinds

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have been used for thousands of years and machines that could encode and

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decode messages were in use before The Modern PC ever came along Thomas

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Jefferson invented a wheel Cipher that was nothing more than wooden discs

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around an axle and then the Germans famously used a typewriter like device

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called the Enigma machine to encrypt military messages during World War II

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although the Allies were able to crack that code now back to the web era modern

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Electronics often use a widespread encryption scheme called public key

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encryption suppose you want to send an email when you click Send the receiving

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computer will provide your computer with what's called a public key a public key

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is generated by the computer just randomly choosing a very large number

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and running it through some mathematical functions once your computer receives

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this public key it uses the the key to lock the email using a special algorithm

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then sends it on its way now since anyone can request a public key from a

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computer the public key can't be used to unlock a message otherwise anyone could

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intercept and read your encrypted emails that would defeat the purpose instead

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the recipient's computer unlocks the message with a private key that is

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stored on that system alone making it mercifully impossible for anyone else to

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do the terrible poetry you sent to your girlfriend that has her rethinking

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things public key encryption isn't just used for email it's actually the basis

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of tons of websites that require you to sign in securely if you've ever clicked

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on that little padlock and saw a mention of SSL or TLS these are two

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implementations of public key encryption that are widely used by Google Facebook

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Microsoft and many more to make sure that only you can access your data or

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change your settings now once the sensitive data actually arrives at its

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destination there are a number of other encryption methods used to make sure it can sit on the computer or server safely

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for example you probably have a password and credit card number stored with

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Amazon for example how do they keep those things safe often web servers will

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hash your passwords meaning that they're converted into encrypted strings of text

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through a process that is extremely difficult to reverse and can't be

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unlocked with a key now with all that said it is important to remember that no

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system of encryption is perfect and experts in the field are constantly

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searching for weaknesses in encryption algorithms and devising new ones to

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outsmart hackers so next time you're G chatting a friend about how awesome the

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latest episode of tech quick you was remember that it was really an epic

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digital arms race that allowed you to do that without everyone knowing exactly

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how much of your free time you spend listening to me talk speaking of

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whatever I was talking about mop.com they have all kinds of cool stuff on

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that their site they got like knives they got like keyboards and key apps

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they got like headphones basically if

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it's a consumer electronic item that's like hip and cool and people want to buy

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it m drop works with the manufacturers and Distributors to get the lowest

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possible prices depending on how many people want to buy it so the way it

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works is the more people commit to buy the more people get an even lower price

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on one of the community curated deals that's available on the site so all you

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got to do is sign up you can start browsing around and finding cool stuff

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uh really audio products are a really big one but they have all kinds of

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different stuff and often only available for limited time although sometimes

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particularly popular deals come back like for example they have the ant lion

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mod mic back right now we've actually done a review of that over on my other

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channel Linus Tech tips and I think the longer I keep doing this the more likely

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it is that let's go for a double oh the more likely it is that I'm going to cut

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myself with this so M drop does not any way condone the unsafe use of knives but

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they definitely do sell them to even me

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so uh is that unsafe I don't know you can find out by clicking on the link in

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the video description thanks for watching guys like this video if you liked it dislike it if you thought it

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sucked leave a comment if your feelings are more complicated than either of those things and if you have suggestions

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for future fast as popal episodes just like this one and as always don't forget

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to subscribe to Techquickie for more videos just like this