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The first thing that I would like to talk about is reverse image search.

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And reverse image search is basically a technique that allows you to search the internet using an image

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instead of a certain text or a search term.

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So far, we have learned how we can use search engines effectively by implementing and using some search

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operators, but with reverse image search, you do not need to specify any search operators.

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The only thing that you want to do is to upload a certain picture or an image, and then the search

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engine will look for patterns, colors, shapes and other features within the image that you have uploaded

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to identify potential matches.

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And this has multiple uses.

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In Osint, for example, you can use it to verify an image authenticity by checking whether an image

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has been manipulated or used in different contexts.

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In addition to that, you will also be able to identify where a certain picture or an image has been

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posted or uploaded on the internet.

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And lastly, you can check whether there is any similar content or pictures to the one that you have

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uploaded to search engines.

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The first search engine that I would like to show you to perform a reverse image search is Google.

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Now Google has a huge database, and I always like to start with Google because it always searches for

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the exact image that I have uploaded.

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For example, if I uploaded Rishi Khabra profile picture, then I'm going to see where this profile

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picture has been used on the internet.

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And I'm not going to see any similar pictures to the one that I've uploaded, and we will see this in

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a minute.

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In addition to that, Google will only focus on one single object of the image that they have uploaded.

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For example, if you have uploaded a picture of a person who is standing in front of a very popular

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building, then Google might only focus on the building that is behind the person and not the person

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himself.

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Let me show you a real life example.

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So if you would like to perform a reverse image search on Google, you want to go to google.com and

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then you want to click on this little camera icon.

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And here you can either upload an image or add a link of an image.

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So in my case I would like to upload an image.

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And here are Rishi Kapoor profile pictures that we have downloaded in the previous lecture.

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And let's say that I would like to search for this picture on the internet.

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So I'm going to select it and then Google will analyze this picture.

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And it will check whether it's been posted on the internet or not.

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And we can see here that we were able to find one account which is his GitHub account.

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So I can click on his picture and this will redirect us to his GitHub account.

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Now, we already know that Rishi Kabra is not only using this profile picture on his GitHub account,

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but he also using it on his medium account.

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So let me go to my notes and open his medium account, and we can see that he's using the exact same

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profile picture.

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But Google were only able to identify one account.

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Now, for me this is still useful because if I were able to find one account like this account for example,

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then I can perform a username Osint.

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I can check the repositories and read information about him.

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That might help me to find other accounts that he's using.

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So one account will lead to other accounts, and we have learned multiple methods to do this.

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Now let's go and upload a different image.

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Let's say this one for example.

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And we can see his account.

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So we can keep doing this with all of his profile pictures to find all the accounts that he's using.

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And from there, you can perform all the techniques that you have learned from previous sections.

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Now let me go to my website here.

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I have my profile picture.

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I'm going to open it in a new tab.

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And then this time I would like to copy or search for this image by URL.

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So I'm going to copy the link and then go to Google and click on this camera icon and add the link in

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here.

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And then click on search.

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And as you can see Google were able to find this image on my website.

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The last thing that I would like to show you is a browser extension called Search by Image.

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That will make your job much easier.

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So it will basically perform reverse image search or multiple search engines like Bing, Yandex, Baidu,

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etc. so all I have to do is just to click on Add to Firefox And then click on add again.

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And now it's added to my browser.

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And now let me go to my website, for example.

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And when you find a certain profile picture or any picture, for example, you can right mouse click

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and here you will see an option called Search by Image.

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And you can search on all search engines or select only one search engine.

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In my case I would like to search for this image on Google.

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And as you can see we did not get any search result.

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So this is why it's also very important to perform this manually, because sometimes these tools might

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not show you any results.

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Although this picture is already indexed by Google.

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So let me search for this image on Bing.

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For example.

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Here I were able to find my profile picture on my website cyberstalk.

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So in this lecture you have learned what reverse image search is and how you can use Google to find

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the original source of an image or a picture.