The transmission service of http is plain text transmission. The so-called plain text transmission is to capture the packet between the communicating parties and find that the header of http is plain text. You can easily obtain the information in cookies and URLs. Don’t underestimate it. These http header information, the account names and passwords of many accounts used to exist in these two locations. Of course, with the application of hashing, encoding and other technologies, it is not easy to obtain passwords now. At the same time, the data part of http is also clear text, and the data content, such as text, pictures and videos, can be easily restored.
Therefore, the https service appeared, which encrypts the plain text transmission content, including the http header and data part. Since the encrypted data is a bunch of messy binaries, it is impossible to obtain meaningful information.
To be precise, https is not a protocol, but a service that combines TLS and HTTP protocols. Therefore, http is still http as before, but the ssl protocol is added between the http and TCP (of course there is also DTLS, not to mention) layers, so that the data part of the upper layer of tcp can be encrypted and transmitted.
In fact, SSL can be designed to be very simple, because the main function of this layer is to negotiate the encryption keys of both parties in the communication, and then encrypt and decrypt the upper layer data. The reason why SSL is so complex in design lies in the existence of digital certificates. First of all, there are two encryption methods, symmetric encryption and asymmetric encryption. Symmetric encryption is faster than asymmetric encryption. Therefore, in actual applications, encryption with large amounts of data is symmetric encryption.
However, symmetric encryption cannot guarantee the security of the key, so asymmetric encryption is needed to transmit the key used in symmetric encryption. Asymmetric encryption requires a digital certificate because it needs to verify the identity of the communication peer. . Of course, the function of a digital certificate is to carry the signature to verify the identity of the communication peer. In openssl (openssl is the implementation of a bunch of RFCs of the SSL protocol), the certificate also has another function of carrying the asymmetric encryption public key and asymmetric algorithm. wait.
Therefore, for websites that use https transmission, a digital certificate is required.
The full English name of SSL is Secure Sockets Layer, which is translated into Chinese as "Secure Sockets Protocol". It is a security protocol that provides security and data integrity for network communications. The SSL certificate is a type of digital certificate. It is a server certificate that complies with the SSL Secure Socket Layer protocol. The website installs and deploys the SSL certificate to realize website authentication and data encryption transmission functions.
If a specific website has an SSL certificate installed, it will have the following benefits:
1. Improve the ranking of corporate websites
Currently, mainstream searches such as Google and Baidu The engine stated that it would give priority to including websites starting with HTTPS and give the websites high weight, effectively improving the ranking of website keywords. Installing an SSL certificate on a website can upgrade the website from HTTP to HTTPS.
2. Website privacy information encryption
Encrypt the data transmitted by the website, including website users’ account passwords, ID cards and other private information to prevent hackers from monitoring, stealing and tampering. At present, most websites involve the transmission of users' private data, so it is necessary to install an SSL certificate.
Anxin SSL certificate cooperates with many world-renowned SSL certificate brands. There are many different types of SSL certificates. The main installation fee is free, and professional and technical personnel provide full guidance.
3. The browser is trusted
If the SSL certificate is not installed, users will be prompted that it is unsafe when accessing the corporate website through browsers such as Google and Firefox, which will inevitably affect the user's Access experience, and install an SSL certificate issued by a trusted certificate authority, it will become a trusted site for mainstream browsers such as Google and Firefox.
4. Prevent traffic hijacking
Ordinary http websites are very vulnerable to network attacks, especially traffic hijacking, which will force users to visit other websites, thus causing website traffic loss. By installing a trusted SSL certificate, your website can effectively avoid traffic hijacking
5. Improve corporate image
Installing an advanced SSL certificate will not only cause a green lock and "https ”, the company name will also be displayed, which will greatly increase users’ trust and at the same time enhance the company’s image and credibility.
The SSL certificate can effectively protect the security of website data transmission and prevent information from being tampered with or stolen. For example, if a website's user information, transaction information, etc. are accidentally stolen or hacked by criminals, it will cause huge property losses. Therefore, it is currently recommended that all websites install SSL certificates. If you want to install an SSL certificate, I personally recommend Tian Weicheng's vTrus SSL certificate is a domestically produced CA brand and has passed WebTrust audit certification. It uses the RSA2048 algorithm. Existing cracking technology would take nearly 100 years to crack. It is safe and reliable, and Compatible with 99 browsers and systems. There is currently a Double Eleven promotion going on, with favorable prices. And it has been officially launched on the Alibaba Cloud platform, allowing you to place orders online and enjoy Alibaba Cloud's after-sales guarantee.
It can prevent traffic hijacking, improve search rankings, eliminate phishing websites, protect the interests of users and enterprises from harm, and enhance user trust.
Because, in order to prevent phishing websites, website transmission is encrypted to prevent the leakage of relevant information. The SSL certificate can encrypt the corresponding channel for users to access the website, using the signature algorithm sha256rsa and the number of bits 2048 to protect the security of the website.
To be secure and to be opened by modern browsers.
Installing an SSL certificate on the website ensures the security of the data during transmission from the transport layer and ensures that the data will not be intercepted or tampered with.
In addition, in addition to SSL ensuring the security of data transmitted by the website, Jingan Network also protects the absolute security of the website from all levels in real time through the "world's first mimicry protection system".
1. SEO optimization (search engines give priority to HTTPS websites, of which the official one is Baidu)
2. Anti-hijacking (mobile data hijacking, HTTP protocol hijacking, traffic hijacking, etc. are the most Frequently, for those who do Baidu promotion or mobile advertising, this point must be paid attention to, otherwise the ads will be for others! Site-wide HTTPS is the solution to eradicate traffic hijacking by operators and middlemen. It can not only eliminate small files inserted into web pages Advertising can also protect user privacy and security.
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3. Program Development (Starting from January 1, 2017, Google’s Chrome browser will mark websites that are not HTTPS encrypted as “unsafe” websites; at the same time, all iOS apps in the Apple App Store will Applications will be forced to adopt the ATS standard, which means the use of HTTPS is mandatory; e-commerce website paypal online payment must implement an SSL certificate and force TLS1.2, WeChat applet, Android and Apple APP development, online game platform, voice dialogue, login payment platform, etc.)
4. The small green lock in the address bar (mainly reflected in the browser address bar, making netizens and customers more trustful, reflecting the brand image, and allowing customers to access more safely)
5. Eliminate Phishing websites (the green icon in the HTTPS address bar can help users identify phishing websites, protect the interests of users and enterprises, and enhance user trust)
6. Exchange data encryption (for the purpose between the server and the client) Encrypt data transmission between the two)
7. HTTPS can effectively protect user privacy (data confidentiality, data integrity, identity verification)
The following is a summary of several necessary sites Requires HTTPS (e-commerce systems, user-oriented websites such as email, highly private websites such as payment systems and finance, websites with search engines as the main source of traffic, websites that focus on user experience)
Many webmasters seem to If you don’t understand what https sites are about, let’s start with traditional sites: the http hypertext transfer protocol of traditional sites uses plain text transmission mode, and there are a large number of gray intermediate links. The plain text information is transferred between intermediate proxy servers, routers, Wi-Fi hotspots, communication service operators and other layers of node relays. Each layer may cause the transmitted data to be stolen or tampered with by a third party. This protocol is considered a very unsafe transmission protocol. At this point, the https encryption protocol came into being. This protocol establishes an SSL encryption channel between the user's browser and the server, encrypts the data for transmission, and greatly reduces the risk of being stolen or tampered with by a third party.