Top 10 Best Google Gravity Tricks 2018

Top 10 Best Google Gravity Tricks 2018

Google is the search engine where the people look up for the things. Yet apart from being only a search engine this website is highly functional and has a lot of functions dubbed inside it. And even the webmasters don't know about all the features as they are so vast that you need to explore lots of things to get to know about them all.  There are a number of gravity opposing tricks in the Google search page that you would like to enjoy. Well many of you guys must be new to this word as only 15% of Google users know this thing and for rest, I'm here to guide you up in this. Here in this article, we have written about the best google gravity tricks that you could ever find in this year. If you are interested to know about it then please read the main section of this post as it is given below. This was all the introduction part of this post and now after this line, we are going to skip to the main section. We recommend you to read till the end to get the fullest information from this page!

Top 10 Best Google Gravity Tricks 2018

Below I have mentioned some of the best tricks that I tried as I was getting bored and thought about exploring something new and then I searched Google Tricks on google and then I get to know that even these things are also possible on the Google. You can use so many different things to kill your boredom on Google. There I decided to note down these tricks and share the article with you so that you can also avail these. So follow the below guide to proceed.

#1 Google zero gravity level fall

Best Google Gravity Tricks 2018

This is the first trick that amazed me as when I get to know this thing can happen when I was really surprised as it was quite funny. It is a standout amongst the most astonishing google gravity trap. In this trap, the substance will appear like tumbling to a level surface. Every one of the substances like pictures, writings, and so on of your page will be upset. They will look somewhat bouncy and turned around that looks exceptionally energizing and stunning.

#2 Google Sphere

Best Google Gravity Tricks That You Need To Try

This is second best google gravity trap. In this trap, the substance rotates in a round way. Be that as it may, you will think that its little hard to deal with it since you need to chip away at turning writings.

#3 Google Loco

Best Google Gravity Tricks That You Need To Try

This google gravity trap is much like the google zero gravity. You will see the substance as falling in a seismic tremor,

#4 Zerg Rush

Best Google Gravity Tricks That You Need To Try

This is one of my most loved google gravity trap. In this deceive you will see somewhere in the range of zeros spreading in your page. to utilize this trap Open Google.com and hunt Zerg Rush through utilizing the search bar.

#5 Google submerged

Best Google Gravity Tricks 2018

This is of the most attractive google gravity trap. In this deceive you will see a domain of submerged. You will see the pursuit bar coasting in the water.

#6 Do a barrel roll

Best Google Gravity Tricks That You Need To Try

This is likewise an astounding google gravity trap. In this deceive, you will get an impact to your page with which, your page will turn in a solitary minute.

#7 Google Guitar

Best Google Gravity Tricks That You Need To Try

This is additionally a stunning google gravity trap. In this deceive, you can play guitar on the web index. You can play your coveted tunes with it. Google will give you notes to your tunes.

#8 Google zero gravity reversal

Best Google Gravity Tricks 2018

This is one of the coolest Google gravity trap. In this deceive, you will get a perfect representation of your site page. You will feel like you are on the opposite side of the screen.

#9 Google space

Best Google Gravity Tricks That You Need To Try

In this google gravity deceive you encounter a dream of the room. It implies that the substance of your page will appear like gliding noticeable all around with no gravitational power.

#10 Pacman

Best Google Gravity Tricks 2018 That You Need To Try

This is the standout amongst the most energizing google gravity trap. With this deceive, you can play Pacman game in this.

Finally, after reading this article, you have got to know about. We have tried to provide you this content in the simple and easy to read wordings and hope that you would have easily got about everything written up here. We believe that you might like this article and if it is what you think then please try to share it with others too. Your indulgence in our post is really valuable to us, so do not miss to write about your opinions and suggestions regarding this article through using the comments section below. At last but never the least thanks for reading this article!

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Security And Privacy Of Social Logins (III): Privacy In Single Sign-On Protocols

 This post is the second out of three blog posts summarizing my (Louis Jannett) research on the design, security, and privacy of real-world Single Sign-On (SSO) implementations. It is based on my master's thesis that I wrote between April and October 2020 at the Chair for Network and Data Security.

We structured this blog post series into three parts according to the research questions of my master's thesis: Single Sign-On Protocols in the Wild, PostMessage Security in Single Sign-On, and Privacy in Single Sign-On Protocols.

Overview

Part I: Single Sign-On Protocols in the Wild

Although previous work uncovered various security flaws in SSO, it did not work out uniform protocol descriptions of real-world SSO implementations. We summarize our in-depth analyses of Apple, Google, and Facebook SSO. We also refer to the sections of the thesis that provide more detailed insights into the protocol flows and messages.

Part II: PostMessage Security in Single Sign-On

It turned out that the postMessage API is commonly used in real-world SSO implementations. We introduce the reasons for this and propose security best practices on how to implement postMessage in SSO. Further, we present vulnerabilities on top-visited websites that caused DOM-based XSS and account takeovers due to insecure use of postMessage in SSO.

Part III: Privacy in Single Sign-On Protocols

Identity Providers (IdPs) use "zero-click" authentication flows to automatically sign in the user on the Service Provider (SP) once it is logged in on the IdP and has consented. We show that these flows can harm user privacy and enable new targeted deanonymization attacks of the user's identity.

• Introduction to XS-Leaks in Single Sign-On
• XS-Leaks in Single Sign-On: Account Leakage Attack
• XS-Leaks in Single Sign-On: Identity Leakage Attack
• Automatic Sign-In and Session Management Practices in the Wild

Introduction to XS-Leaks in Single Sign-On

Cross-site leak (XS-Leak) refers to a family of browser side-channel techniques that can be used to infer and gather information about users [...]. While the deanonymization capabilities of XS-Leak attacks are only just being realized, some researchers have said the technique will soon be in the OWASP Top 10. 

Source: Latest cross-site leak (XS-Leak) news | The Daily Swig

In SSO setups, redirects can leak private information about the user. Thus, we focused on XS-Leaks that detect cross-origin redirects, i.e., whether a cross-origin request returns an `HTTP/200` or `HTTP/302` response. In this post, we present an XS-Leak that is based on the Fetch API and detects cross-origin redirects with 100% accuracy. The following method expects a URL, sends a GET request, and finally returns `true` if the response is a redirect or `false` if the response is no redirect:

// let is_redirect = await xs_leak_redirect("<URL>");  async function xs_leak_redirect(url) { 	let res = await fetch(url, { 		mode: "cors", 		credentials: "include", 		redirect: "manual" 	}).then( (response) => { 		if (response.type == "opaqueredirect") { 			return true; 		} 	}).catch( (error) => { 		return false; 	}); 	return res; } 

More details are provided in Section 5.1.4.1 of the thesis.

XS-Leaks in Single Sign-On: Account Leakage Attack

With the account leakage attack, the attacker can determine whether the victim has an account on a targeted SP with a certain IdP. Specifically, the attacker checks whether the victim has granted consent to the targeted SP with the IdP. This attack is scalable: The attacker can test multiple (SP, IdP) pairs and check for which pair the victim has an account on the SP. The following prerequisites must hold:

• The victim visits an attacker-controlled website.
• The victim is signed-in on the IdP (i.e., in Google Chrome with its Google account).
• The IdP supports the standardized `prompt=none` parameter.

The attack idea is simple: Let's assume the attacker wants to know whether the victim has an account on SP `sp.com` with the IdP `idp.com`. The attacker first tricks the victim into visiting its malicious website `attacker.com`. We further assume that the victim has an active session on the IdP. Then, the attacker constructs an Authentication Request URL, as shown in the figure below. Note that the SP `sp.com` has the `client_id=superSecretClient` on the IdP, the `redirect_uri` is set to `sp.com/redirect`, and the `prompt=none` parameter is set. 

From the attacker's website, a cross-origin `Fetch` request is sent to that URL as shown before. If the `prompt=none` flow is requested with established consent on the SP, the IdP returns the Authentication Response as an `HTTP/302` redirect to the `redirect_uri`. If the victim has not granted the SP's consent, the IdP returns the consent page with an `HTTP/200` response and asks the user to grant the consent. Thus, based on whether the victim has or has not an account on `sp.com`, the IdP returns an `HTTP/302` redirect or an `HTTP/200` response. Although the Same Origin Policy prevents us from viewing the response from `idp.com`, we can use the XS-Leak to detect whether a redirect was performed or not. If a redirect was performed, the victim has an account on `sp.com` with the IdP. If no redirect was performed, the victim has no account.

We tested this attack with the Apple, Google, and Facebook IdP. It only works for Google and Facebook since Apple requires user interaction in each flow. A working PoC is provided on https://xsleak.sso.louisjannett.de. If the "Start" button is clicked, the website checks if you have an account on adobe.com, ebay.com, imdb.com, medium.com, or vimeo.com using either the Google or Facebook IdP. Make sure that you are signed in at Google and Facebook before testing and enable third-party cookies.

To circumvent this attack, the IdP must return an error as `HTTP/302` redirect if the `prompt=none` flow is requested, but no consent is given. This mitigation is described in the OpenID Connect specification, but as shown, not adopted by real-world IdPs.

More details are provided in Section 5.1 of the thesis.

XS-Leaks in Single Sign-On: Identity Leakage Attack

The identity leakage attack extends the account leakage attack by the `login_hint` parameter. The attacker can determine whether the victim has a certain identity on a targeted IdP. The attacker can use this information to check if a certain person is visiting its website. Therefore, all prerequisites of the account leakage attack must hold and the IdP must support the standardized `login_hint` parameter.

Once a victim visits the malicious website, the attacker must initially guess an (SP, IdP) pair that the victim most likely gave consent to, i.e., that causes the IdP in the `prompt=none` flow to return a redirect to `sp.com/redirect`. The attacker can use the account leakage attack to determine such a pair by testing the most-popular SPs and IdPs. Then, a new Authentication Request is created, and the `login_hint` parameter is set to the email address of the victim, i.e., `alice@example.com`. The attacker sends the Fetch request and determines whether the IdP returns an `HTTP/302` redirect or an `HTTP/200` response. If a redirect was performed, the attacker knows that the Authentication Request was valid, and thus the victim is `alice@example.com`. If no redirect was performed, the victim is not `alice@example.com`. The success of this attack depends on whether the attacker can guess (or eventually knows) an (SP, IdP) pair that the targeted victim gave consent to.

We tested this attack with the Apple, Google, and Facebook IdP. It only works for Google since Apple does not support the `prompt=none` flow, and Facebook does not support the `login_hint` parameter. We discovered that the `login_hint` parameter must contain a valid email address registered at Google. Otherwise, this parameter is ignored.

To mitigate this leakage, the IdP must return an error as `HTTP/302` redirect if a `login_hint` parameter is queried that the user does not own. We did not find any information about the `login_hint` parameter in the OpenID Connect specification that proposes guidelines for this scenario.

More details are provided in Sections 5.1 of the thesis.

Automatic Sign-In and Session Management Practices in the Wild

Following the observations of the account leakage and identity leakage attacks, we analyzed "zero-click" SSO flows in terms of automatic sign-in features provided by the IdPs with their SDKs. We found that under certain assumptions, the SDKs can be configured to automatically sign in the user on the SP even though the user did not click on the sign-in button and may not notice the sign-in process.

Google and Facebook support automatic sign-in with their SSO SDKs: Google Sign-In, Google One Tap, and Facebook Login. They follow a similar approach: The user visits the SP website that integrates and initializes the SDK with automatic sign-in enabled. Suppose the user has an active session on the IdP, valid consent for the SP, and third-party cookies enabled. In that case, the SDK first retrieves a logout state from browser storage to determine whether the user signed out previously using the SDK's sign-out method. If the logout state is set to false or does not exist, the SDK returns the Authentication Response to the SP website, i.e., to a registered callback. If it is set to true, the SDK does not proceed with the automatic sign-in and instead requires the user to click on the sign-in button. Thus, the execution of the automatic sign-in flow depends on the stored logout state. If the browser storage is cleared (i.e., cookies are deleted or a private window is opened), the logout state does not exist, and thus the automatic sign-in is enabled.

Note that the logout state is only a feature provided by the SDKs to stop unwanted sign-in operations on the SP. They do not prevent the SP from secretly receiving tokens from the IdP. If the SP does not use the SDK's sign-out method, the logout state will never be set to true. Alternatively, the SP may manually request the tokens from the IdP in the background without paying attention to any logout state. Note that this automatic sign-in flow is different than the standardized `prompt=none` flow because it returns the tokens in the background (i.e., via Fetch requests), whereas the `prompt=none` flow requires a redirect that is in some form visible to the user.

Google and Facebook use different approaches to receive the Authentication Response in the background. Google sends a `getTokenResponse` RPC from the SP website to its proxy iframe and receives the tokens with postMessage. Facebook issues a simple CORS request and receives the tokens in the CORS response.

For instance, SPs can send the following CORS request with the Fetch API to Facebook:

GET /x/oauth/status?client_id=<CLIENT_ID> HTTP/1.1 Host: www.facebook.com Origin: https://sp.com Cookie: c_user=REDACTED; xs=REDACTED; 

If the user has an active session at Facebook (i.e., cookies are set) and valid consent, Facebook responds with a CORS response and explicitly allows the SP to read the `fb-ar` header that contains the tokens:

HTTP/1.1 200 OK Access-Control-Allow-Origin: https://sp.com Access-Control-Allow-Credentials: true Access-Control-Expose-Headers: fb-ar,fb-s fb-s: connected fb-ar: {"user_id": "REDACTED", "access_token": "REDACTED", "signed_request": "REDACTED"} 

We tested the automatic sign-in on top-visited SPs and found that some of them implement it as expected. For instance, `change.org` supports automatic sign-in with Facebook: First, we open `change.org` without being logged in on Facebook. Thus, we are not signed-in automatically. Then, we log in on Facebook and reload `change.org`. As shown, `change.org` uses the CORS request to receive the tokens from Facebook and finally logs us in. The user interface does not indicate that we were just signed in. Only the small profile picture in the top right corner is added to the UI.

More details and examples of automatic sign-in flows are provided in Section 5.3 of the thesis.

Acknowledgments

My thesis was supervised by Christian Mainka, Vladislav Mladenov, and Jörg Schwenk. Huge "thank you" for your continuous support, advice, and dozens of helpful tips. 

Also, special thanks to Lauritz for his feedback on this post and valuable discussions during the research. Check out his blog post series on Real-life OIDC Security as well.

Authors of this Post

Louis Jannett

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