In fact, what you said about "many websites can apply for their own certificates" is incorrect. No website can make its own certificate, so it needs to spend money to buy a certificate in official website. The process of making the certificate is as follows: we submit the serial number, the website adds a certain number, and submit it to official website. official website sends the certificate to the website, and then the website sends it to you. The website has to pay official website a handling fee every year, which seems to be $200, and this certificate is not a certificate for each machine, but.

Many verification posts we saw on the internet replied that they wanted to apply for a permit. In fact, they also submitted the serial number of their mobile phone to the website, and the website submitted it to Saipan. When it is finished, he sends it to the certificate seeker with only one bend in the middle.

After getting the certificate, you should import the software "free signature", use this software to sign the software in sis format to make it in SIXX format, and you can install it. For example, a mobile phone is a house with a lock on the door and a password lock. The "free signature" software is the key and the certificate is the password.

Android system is open source, and it doesn't need certificates, so the corresponding security will be poor and easy to be poisoned. The certificate is only for S60V3 and above.

A question about you:

The certificate is not unique, but we just don't know it. It is unlikely that the mobile phone that applied for the same certificate will be in the same place.

The original intention of the certificate competition class is not for us, but for software developers. The software they made is in sis format and cannot be installed directly. Moreover, because it is a third-party software, there is a risk of system error after being installed on the mobile phone. The competition class gives the developer a certificate, which he uses to sign the installation. Since he installed it himself, he is responsible for the system errors after installation, which has nothing to do with the competition class. This can be understood as: we are not responsible for the goods sold, and those popular software such as QQ, various browsers, e-book readers, music players, etc., because of the strength of the producer (usually the company), Saiban also thinks that this kind of software will not be risky, so they directly issue certificates to them, so they see sisx format, which can be installed directly without certificate signature.

So we are not software developers, why can we get the certificate? The answer is simple: Saipan makes a profit and closes one eye. However, the situation has changed recently. Cybertron official website stops issuing certificates, and cannot install third-party software unless the mobile phone is cracked. As for the specific reasons, it seems to have something to do with Nokia's plan to abandon Cybertron, or it may have something to do with the latest method of cracking mobile phones. Who knows?

Pure mobile phone typing, thank you for reading, please correct me.