Signed in unable to install trusted. How to solve the "Unable to establish a reliable connection to the server" problem in Google Play. Firmware and hard reset. It is impossible to establish a secure connection in Yandex. Safari browser secure connection with

Yadnex.Browser copes with its responsibilities perfectly and even, according to some statistics, reaches the top best browsers. In pursuit of leadership, developers make a huge effort to make the browser more convenient, faster and simpler than their competitors. Today, the new trend is to add additional security features to the browser, thus making them universal. But this does not always lead to positive results. An example of this is the error: “It is impossible to establish a secure connection” in the Yandex browser.

There are several reasons why this error appears in the Yandex browser.

How to resolve the “Unable to establish a secure connection” error

We configure https/ssl certificates for access to a blocked site.

Open the Yandex Browser settings.
Next, open “Advanced” at the very bottom of the page.
We find https/ssl in the list. Here will be all the certificates that are available on your PC. They can also be customized.
It is necessary to uncheck the main points: server certificate of authenticity, at the bottom you need to uncheck the “Trusted DNS server” item.
These actions must be applied to all sections: other users, personal, etc.

It is worth noting that by unchecking these items, you are putting your computer at risk, so this should be done only as a last resort if you really need to log into a particular site.

Add-ons that can block the site

The latest versions of the Yandex browser have add-ons that are built in by default. Surely you have heard about them: Adgrard, Antishock, Protect. If an error occurs: “a secure connection cannot be established,” these add-ons must be disabled. It is also necessary to turn off anti-virus software for a short period of time.

The browser add-on store consists of software, which can be developed by anyone who is more or less able to program. Draw your own conclusions. The more such add-ons are installed in the browser, the greater the likelihood that its operation will be unstable. Open the add-ons on your browser and remove any that you find unnecessary. This will speed up and improve general work browser.

Cookies and Yandex Browser version

If a resource to which access is blocked by the error “Unable to establish a secure connection” is important to you, then you can use earlier versions of the browser from Yandex. Download and install an earlier version. Even if a message appears about an impossible connection, you can easily close this message and then go to the desired site without any blocking.

Another reason is the "container" with cookies. It is sometimes necessary to clean them, otherwise various types of errors may occur in the browser.

You can do this in the settings, go to your browser history and click “Clear”.
Below the “Clear history” item there are 5 lines with settings; check the first 4 - this will reduce the likelihood of new errors appearing in the browser.

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A secure connection to a server is a method of accessing the Internet that allows you to minimize the loss of the most important information.

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When sending an item to your friend, you put it in a case, securely close it and take it to the postal employee. The courier delivers the case to the address, but your friend is unable to open it because you did not send the keys. Then the friend takes his lock, hangs it on the case, and sends the package in the opposite direction. When you receive the case, you remove your lock and send it back to your friend. As a result, the friend, completely confident in the safety of the goods, receives the case under his lock and key.

As the Internet becomes more and more popular every day, the risk of important information falling into the wrong hands, which needs to be secured, increases.

So that personal correspondence, bank details, telephone and passport numbers are not detected by other users, site owners are increasingly using a secure connection, which looks like a padlock located in address bar every fifth resource.

Why is HTTPS needed?

There are several types of connections on the Internet. But this article will talk about two of them. Speaking in simple language, note that the usual connection in the address bar of the site is written as http://..., and the designation https://... corresponds to a secure connection.

Using the HTTPS protocol for data transfer increases user confidence in the resource. This method establishes certain rules for data exchange between the client and the server. It encrypts information, reducing the risk of data theft.

MozCast provided statistics that show an increase in the number of sites in the top search results that use a secure data transfer protocol.

Search engines are more willing to trust and rank those resources that provide greater protection for user data.

The secure data transfer method has disadvantages:

such a server works slower because it contains additional processing, aimed at encrypting information;
You will have to constantly pay to update the certificates responsible for a secure connection.

If you are the owner of, for example, an online store, and users need to provide their payment information, then you will have to use the HTTPS protocol. We must not allow criminals to steal personal information.

What does a secure connection protect against?

To understand the principle of such protection, two important factors must be taken into account:

When you do something on the Internet - communicate on social networks, pay for an order, read the news, between your computer and the server goes data exchange. The machine sends a request to the server and receives responses from it.
The signal from the computer passes through several nodes. Before it reaches the server, the request will pass through intermediate towers and servers. Their number depends on the provider and the quality of communication.

So, since the HTTP information transfer protocol is open, all unprotected information, the computer request and the server’s return signal are in the public domain. Therefore, at each stage of data transmission, an experienced network criminal can easily intercept any information.

It's not very scary if a hacker gets hold of your private comments on social networks. It is more dangerous when passport data, payment details and banking information fall into the hands of a thief.

To ensure the security of the transmission of personal data online, the secure HTTPS protocol was invented in 1994. It has a cryptographic algorithm for encrypting SSL/TSL requests, which has a special secret key. The letter “S” in the abbreviation HTTPS is taken from the word secure, which means security in English.

Initially, the https:// connection was used only to verify users who entered their personal data: login - password, passport number, bank card. Gradually, when people became more concerned about safety, this idea was adopted social media and search engines.

Why sometimes a secure connection cannot be established

Sometimes, when you try to access a website, you may find a message in your browser that says “Your connection is not secure.” This failure does not mean that your computer was attacked by a hacker and some valuable information was stolen. Also this error has nothing to do with yours network equipment and the Internet.

The essence of such protection lies in a certificate that encrypts the entire path of information flow via the SSL/TSL protocol. Therefore, the error that states “This site cannot provide a secure connection” appears due to a failure in certificate verification. Reason similar problem may be a browser, Internet resource or computer settings. In this case, you should first check your browser, disable all extensions and clear the cache, and only then check other computer settings.

Untrusted connection.
Try accessing the site through a different Internet connection.
Incorrect operation of extensions.
for example, when using the Research Bar and Grumble extensions, this error may occur.
Blocking by antiviruses.
If the error persists, you should disable your antivirus. Some antiviruses (AVAST, ESET Smart Security) prohibit entry to resources that operate via an HTTPS connection.
The browser is not working correctly.
Sometimes viruses affect the functionality of the browser, which leads to a number of errors.

A secure protocol is a step towards ensuring the safety of users' personal data. But this is not a panacea. Take precautions when working and do not leak personal information.

Due to the increasing frequency of blocking of web resources, an increasing number of users have to deal with access errors. However, they may not always be related to sites being blocked by providers; the problem may be hidden on the computer itself. This is an error, and it does not matter which browser is used.

The error may occur due to the lack of a certificate on the site confirming the safe operation of the browser with this site. SSL , also the reason for its appearance may be related to changes in the settings of the software responsible for system security. Today we will look at one of the most common variants of the above error, in which the user receives a notification "Website "URL" sent an invalid response. ERR_SSL_PROTOCOL_ERROR" .

We can say with a greater degree of certainty that everything is fine with the site itself, however, you can check its availability using some service like ping-admin.ru won't hurt either. If the resource is available, you should look for the causes of the error on your computer. There may be several reasons. If the site uses a connection HTTPS first you can check if the protocols are enabled SSL2 And SSL3 in browser properties. Open the classic control panel, launch the applet.

Switch to tab "Additionally" and make sure that in the checkboxes SSL 2.0 And SSL 3.0 checkboxes are checked.

At the same time, check if it matches time on a PC with your time zone. If not, set right time and enable synchronization.

Alternatively, you can try disabling protocol filtering HTTPS , although it is undesirable to do this, since this reduces the level of security. In , for example, this can be done as follows. Go to internal address chrome://net-internals/#hsts , select from the menu on the left HSTS, in field "Delete Domain" insert the address of the problematic site without the prefix HTTPS and press "Delete".

After this, you will be able to log into the site using the usual protocol. HTTP .

Note: Before making changes to protocol processing settings, you need to completely clear your browser cache and delete saved files cookies, and then try to access the site. If the login is completed without errors, with filtering disabled HTTPS there is no need to rush.

There is a very high probability that access to the site is blocked by the anti-virus software installed on your computer. Sometimes the cause of the error becomes obvious after enabling it in the browser private mode (incognita). Here, for example, is what it shows when going to a blocked site in incognito mode. In this case the error "This site cannot provide a secure connection" causes antivirus .

Therefore, you need to either disable real-time protection in this program, or add the blocked site to the exclusion list.

The settings of other antivirus software are checked in a similar way. In particular, users had to deal with the described error Dr.Web (firewall settings) And ESET NOD32 ("SSL/TLS protocol filtering" setting) . At the same time, you need to check the operation of the extensions installed in the browser, since some of them, in particular, SaveFrom.net may hinder normal operation with network resources. And one last thing. If you receive an access error when opening a site, use the most common anonymizer, or even better VPN -service, in most cases these tools allow you to bypass such restrictions.

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Many people have problems adding an account to Google directory Play, namely, when logging in, the error “Could not establish a reliable connection to the server” is displayed. How to solve it and what causes it? Read more in our article.

Freedom

In most cases, the source of the problem is a pirated program that allows you to download for free paid content for applications and games in Google Play. If you previously installed Freedom, but then uninstalled it and after that the error “Could not establish a reliable connection to the server” appeared, then you can solve the problem like this:

Download and install Freedom again.
Open the program.
Click “Stop”.
Next, close Freedom and remove it from the device.

If this does not help, then move on to another method, which works in most cases.

Changing Hosts

You can also use an application that forcibly adds a Google account to operating system Android.

date and time

The cause of the error “A reliable connection to the server could not be established” may also be due to incorrectly set date and time on the device. Try setting the date and time manually, or synchronize it with your mobile operator. This often helps.

Firmware and hard reset

If all the previous methods did not help, then you can do a hard reset ( Hard Reset) devices - software (through settings) or hardware. A soft reset can be found in the settings of any device (“Factory reset”). Hard hard reset pressing certain hardware buttons is done differently for all devices - you can find out about this on the Internet.

You can also install another firmware on your smartphone, or reinstall the original one manually. Another similar method is to install the free GApps package through recovery. Before hard reset and other extreme ways to solve Google Play problem definitely a must do backup copy devices.

Insert another SIM card into your device and add a Google account.
Run the wizard initial setup devices.
Turn off two-factor authentication in Google account.
Turn off Google Play and Google Services Play in the application menu, delete data, turn on and restart the device.

We configure https/ssl certificates for access to a blocked site.

Open the Yandex Browser settings.
Next, open “Advanced” at the very bottom of the page.
We find https/ssl in the list. Here will be all the certificates that are available on your PC. They can also be customized.
It is necessary to uncheck the main points: server certificate of authenticity, at the bottom you need to uncheck the “Trusted DNS server” item.
These actions must be applied to all sections: other users, personal, etc.

It is worth noting that by unchecking these items, you are putting your computer at risk, so this should be done only as a last resort if you really need to log into a particular site.

Currently, this is done to ensure that your browser contains a list of "trusted" certificate authorities. This is bad because you have to bow to the fact that you are the central authority to verify the security of your connections - and why should you submit to a self-proclaimed authority to be able to participate in secure communication?

How to resolve the “Unable to establish a secure connection” error

Today, information and telecommunication technologies are an essential basis for business transactions. The transported data has enormous economic value. Because they are based on business processes, customer relationships, product development, and even entire business models. As such, data loss and data theft are financially, legally and detrimental to a business, even existentially threatening in extreme cases. Moreover, given the value of the data being transferred, these connections must be effectively encrypted.

Add-ons that can block the site

The latest versions of the Yandex browser have add-ons that are built in by default. Surely you have heard about them: Adgrard, Antishock, Protect. If an error occurs - “a secure connection cannot be established”, these add-ons must be disabled. It is also necessary to turn off anti-virus software for a short period of time.

Then any attacks on internetwork connections will certainly not go anywhere. For example, while data packets at level 1 are almost represented only as zeros and ones, level 7 contains an email that anyone can read. Encryption is more complex and expensive because there are more layers involved. That is, the more they are “shrouded” in the rules and standards of the protocol. Layer 3 encryption requires additional bandwidth and thus brings user data to the receiver more slowly than layer-based encryption.

The browser add-on store consists of software that can be developed by anyone with some programming knowledge. Draw your own conclusions. The more such add-ons are installed in the browser, the greater the likelihood that its operation will be unstable. Open the add-ons on your browser and remove any that you find unnecessary. This will speed up and improve the overall performance of the browser.

Negotiated Layer 2 Encryption

On the way from one place to another, this adaptation does not decrypt the data anywhere. Key exchange occurs according to the Diffie-Hellman method. When exchanging keys, it must be ensured that the appropriate communication partner is uniquely identified and that no third party interferes without permission. This requires an authentication procedure that is performed against pre-established keys. By the way, the system used separates device management from encryption management.

Cookies and Yandex Browser version

This ensures that only authorized persons have access to key management. At the same time, separation takes into account security concepts that ensure strict separation between network and security permissions. At the end there are about 90 decision makers from the housing industry in Hertnick in Munich. With digitization, the need for data protection increases even for smartphones and tablets. Significantly improved technology makes it easy to set up and maintain corporate communications without sacrificing quality. The minimum contract period is 24 months. The box will be mailed to the customer before the connection is established. The mailbox will automatically open after the first connection to the client. Services include only Internet and telephone settings. The prerequisite is a connection address in a building with an existing fiber optic connection in Munich, Augsburg or Erlangen. The contract for the use of content from these third party providers is solely between the client and the third party, which may incur additional costs.

Housing Industry: Safely into the Future with Fiber Optics.
Obstacles for data thieves.
Good passwords are still essential.
Some regions have separate rates.
Entrepreneurial use in accordance with the terms of reference.
Transfer for the entire duration of the contract.
A credit for the activity will be applied to the invoice amount; Payment in cash is not possible.

If you see an error indicating that a secure connection cannot be established, it may be due to one of the following reasons.

Another reason is the cookie "container". It is sometimes necessary to clean them, otherwise various types of errors may occur in the browser.

You can do this in the settings, go to your browser history and click “Clear”.
Below the “Clear history” item there are 5 lines with settings; check the first 4 - this will reduce the likelihood of new errors appearing in the browser.

Why HTTPS is secure
Data protection in HTTPS is ensured by the SSL/TLS cryptographic protocol, which encrypts transmitted information. Essentially this protocol is a wrapper for HTTP. It encrypts your data and makes it inaccessible to others. The SSL/TLS protocol is good because it allows two network participants who are unfamiliar with each other to establish a secure connection through an unsecured channel.

Let's say today is the last day of the month, and you remember that you need to pay for the Internet. On the provider's website you find the desired link and go to your personal account. You probably want to keep all transmitted information secret, so it must be encrypted: this is your password, the payment amount and credit card number. The problem is that initially your computer communicated with the provider's server over an open channel, that is, over HTTP. How can you establish a secure connection over HTTPS under such conditions, assuming that the channel is constantly being monitored? A simple mathematical trick allows you to do this.

What is the cause of the error “A secure connection cannot be established”?

However, many firewalls and security software products actively block unknown or unauthorized Internet services. Incorrect proxy configuration settings. Some external programs may change the default proxy settings on your computer when they are installed and not warn you about it. Make sure your computer's proxy settings have not changed and if you are not using a proxy configuration, select the No Proxy option. This can be easily corrected by adjusting the actual time in the system. . You will find the answers to these questions and much more if you keep reading.

How a secure connection works
Imagine that you want to give something to another person. You put it in a box and mail it. And to prevent the courier - or anyone else - from stealing it, you lock the box. The courier delivers the box, but your recipient cannot open it - he does not have the key. Then he puts his own lock on the box and sends it back to you. You receive the box with two locks, remove yours - now it's safe - and send it again. The addressee finally receives a box on which only his lock hangs, opens it and takes out what you sent him.

Imagine that five people intervene in the process of sending a letter: the first one writes the content of the letter and a number of additional data in the header that indicate things associated with this content, such as the size of the letter, its date, language, etc. No one can change the information by intercepting it while it is being sent to its destination. The web page is authenticated, i.e. your site will have a digital signature that will be displayed to those who want to navigate through it, which is your domain and in fact it is your business. All information moves encrypted between the web server and clients. . We'll get to each point later.

This was necessary to exchange encrypted messages with the interlocutor. In the box you sent him the key to the encryption, and now it is known to both of you. Now you can openly exchange encrypted messages without fear of someone intercepting them - they still cannot be understood without the key. Why such complications and why couldn’t it be possible to hand over the parcel separately and the key to the lock separately? Of course, it was possible, but in this case there is no guarantee that the key would not be intercepted and the package would not be opened by someone else.

Why should you use it on your website?

Why you shouldn't use it on your website

Because it negatively affects the page loading time because you need to set the encryption method in the first connection and you have to encrypt and decrypt the data. It's important to know that public key encryption, which is used to protect information, is also used to create a digital signature that verifies that your domain belongs to you. If I had to make a comparison in the real world, it would be as if you signed in front of a notary that your domain belongs to your company, and all the users of your site were present to confirm this action.

The operation of the SSL/TLS protocol is based on a similar principle. When establishing a secure connection over HTTPS, your computer and server first choose a shared secret key and then exchange information by encrypting it using that key. The shared secret key is regenerated for each communication session. It cannot be intercepted and is almost impossible to guess - it is usually a number longer than 100 characters. This one-time secret key is used to encrypt all communications between the browser and the server. It would seem an ideal system that guarantees absolute security of the connection. However, to be completely reliable, it lacks something: a guarantee that your interlocutor is exactly who he says he is.

In this latter case, you will skip the middleman, but this does not mean that in all cases you will consider him cheaper. There are several classifications for certificates.

Verification type refers to the amount of bureaucracy required to confirm that our company actually owns the domain.

100% impossible, since there may be very old browsers with those that don't. . We can find almost any combination of these characteristics in the certificates offered by certification bodies. For example, we can have a certificate that is multi-domain, wildcard, and extended validation, all at the same time.

Why do we need digital certificates?
Imagine that your package did not reach the recipient - it was intercepted by someone else. This person puts his own lock on it, forges the sender's address and sends it to you. When he thus learns the secret key to the cipher, he communicates it to your real addressee on your behalf. As a result, you and your interlocutor are confident that the encryption key was transmitted securely and can be used to exchange encrypted messages. However, all these messages can easily be read and intercepted by a third party, whose existence you cannot guess. Not very safe.

What should a system administrator take into account to avoid losing traffic?

The price for a domain usually ranges from 40 to 300 euros per year. The certificate installation process can be complicated, especially if you don't have a panel that automates the process and also depends on the web server. It is very important that the system administrator remembers to renew the certificate every year or at the appropriate date. It is not uncommon to find clients with a website blocked by a security warning for a full day or more because the administrator did not renew their certificate. The update process may take some time and must be completed before the expiration date.

In the same way, a third party can quietly wedge into the connection between two devices on the Internet and decrypt all messages. For example, you paid for the Internet over a secure connection, and the payment was received. But the attacker intercepted your credit card number and authentication code. You don’t know about it yet, and when you find out, it will be too late. A digital certificate helps to avoid this situation - an electronic document that is used to identify the server.

Installing root and intermediate certificates on the server

Certification companies will not charge you for these additional days to renew; on the contrary, many offer discounts. We can see the expiration date of a certificate by viewing its properties in the browser's advanced settings. Certification authorities also have their digital signature, which they use to sign your certificate. The public key of these is pre-installed in all browsers to verify the signature of the certificates of websites that use them.

You as a user do not need a certificate, but any server (site) that wants to establish a secure connection with you must have one. A certificate proves two things: 1) The person to whom it is issued actually exists and 2) They control the server that is listed on the certificate. Certificates are issued by certification centers - something like passport offices. Like a passport, the certificate contains information about its owner, including the name (or name of the organization), as well as a signature certifying the authenticity of the certificate. Verifying the authenticity of the certificate is the first thing the browser does when establishing a secure HTTPS connection. Data exchange begins only if the verification is successful.

If we return to the analogy with the box and the locks, a digital certificate allows you to verify that the lock on your interlocutor’s box belongs to him. That this is a unique lock that cannot be faked. Thus, if someone else tries to deceive you and sends you a box with their own lock, you will easily understand it, because the lock will be different.

HTTPS distribution
One of the most popular recommendations of any Internet services is to always use the latest versions of the software. If you've never thought about why this is needed, then here's one of the reasons - supporting the latest developments in the field of security.

The spread of HTTPS and new technologies in general on the Internet largely depends on how quickly the infrastructure for their use appears. For example, if half of Internet users had browsers that did not support HTTPS, many sites simply would not be able to use it. This would lead to the fact that the website of a bank that had completely switched to HTTPS would be unavailable for half of its clients.

In addition, vulnerabilities are found from time to time in cryptographic protocols, including SSL/TLS, which allow even encrypted information to be intercepted. To eliminate these vulnerabilities, the protocols are regularly updated, and each subsequent version is usually more reliable than the previous one. Therefore, the more people install modern versions of browsers and other important programs, the more reliably they will be protected.

Where else is encryption used?
There are many data exchange protocols on the Internet, in addition to HTTP and HTTPS, and they must also provide security. For example, Yandex.Mail supports encryption of incoming and outgoing letters, which you can read about in our technology blog on Habrahabr. We care about the safety of our users and try to protect their data wherever possible.