Why do mobile phones need to make signing certificates?

Nokia 5700 Certificate Signature Creation Post (Explains What is Signature and Why Sign) Efficient Signature Post (N73, N95, 5700 and other S60V3 models can be automatically signed) What is a signature? Generally speaking, the signature is to write your own mobile phone serial number into the software you want to install, which is a one-to-one correspondence, and the software that signs a mobile phone user cannot be used by other users, and there will be a certificate error prompt. Specifically, because the S60 3rd system is set up safely.

So the randomly started program or the cracked part of the program that has been sinicized must pass the official certification.。 But not every developer has the ability to pass the official certification. Most of the certified software is a protection segment UID

All the sinicization and cracking of the UID of the protection segment also rely on certificates in a large number of programs. Why Sign? The signature can enable the software to successfully pass the data information verification of the mobile phone, that is, certificate verification; Signatures protect against virus files; The signature can make some software start with the boot of the phone, and there is no need to open the program every time you turn it on; Signatures can simplify the registration process of some software, that is, there is no need to calculate the registration code through the keygen;

Because the S60 3rd system is set up safely, programs that start randomly must be officially certified. But not every developer has the ability to pass the official certification. Most of the software that has passed the certification is the protection segment UID, and all the sinicization and cracking of the protection segment UID also rely on the certificate in a large program.

For programs that need to be started automatically, or that require a certificate to crack, you need to make your own signed version. We can apply for a free certificate for development and debugging as a developer, bind our own mobile phone IMEI number, and can only install it on our own mobile phone (the official rule is that the free certificate can only be bound to a mobile phone serial number). This certificate is very necessary, and there will be quite a lot of software that will require your own certificate in the future.

So be sure to keep it after applying.

Due to the insecurity of the SIS file itself, the virus is easy to write and successfully install on the old platform, so it leads to the previous wave of mobile phone viruses but the real virus must have the ability to replicate itself, and the destructive ability to spread, strictly speaking, there is no real virus on the S60, it can only be said that it is"Quasi-virus",But in order to combine habits and convenience,It's still called a virus Nokia is aware of this problem,Antivirus software can't essentially eliminate this phenomenon,So on the basis of SIS,Launched the SISX file format (that is, the software of the S60 third version of the system) This SISX is no longer the previous SIS file,He will already filter out the insecure ** when packing,It will be destructive to the machine**,If the virus program is packaged with a general-purpose free certificate, Then he will not start randomly and continue to attack after the reboot like the first 2 versions, because the free certificate does not have the permission to start randomly, this is in"Callitus"with"ty screensaver"Where has it been realized and the free certificate software does not have the authority to modify the system folders, like to corrupt the system files? Don't even think about some users asking, it's like a random start"Callitus"Isn't the virus miserable? But don't forget,Although a slightly advanced certificate is used here,But this certificate can only be installed and used for an IMEI mobile phone.,There won't be such a coincidence in the world.,Just hit the IMEI machine?!

Some users will ask, just make a fee certificate, isn't it okay? That's right, it's true that as long as you have high permission, it can be destructive, but there is a problem to pay attention to, the certificate of high authority is a fee-based certificate, you must apply for a certificate from symbian, and you can apply for it after you finish the program, will symbian issue a high permission certificate to a virus software? And also.

Charge certificates"Viruses"Software vendors have to pay software fees every year. It can reach $350 for 1 year! It costs 240,400 euros to apply for a sign in advance.

Well, to put it simply, viruses can't appear on the S60 platform, all the antivirus software that is available now can be removed, for me, those are just a waste of memory. There's no need to worry, and there's no need to go online to get an antivirus, because SisX itself is"Antivirus software" Now you understand, the certificate is simply to protect your mobile phone system, and you must sign if you want to install the software, which means that someone must be responsible for the installation. For example:

You are in charge of a project, and if you want to execute the project, you have to get the boss to sign it!!

Take the mobile terminal as an example, after registering and logging in to the Assured Sign platform, and completing the personal real-name authentication, you can make an electronic signature.

After logging in to the mobile terminal of the Assured Visa platform, click "My" to jump to the page shown in the figure below. On this page, there are three functions: "Signature Management", "Hand-drawn Signature", and "Signature Template".

On this page, you can manually draw your signature, and if you are not satisfied, you can click "Rewrite" to redraw it until you are satisfied. After the drawing is successful, click Submit, and the electronic signature is completed.

If you don't want to draw by hand, you can click "Signature Template" and use the template to make a signature, as shown in the following figure

In the "Signature Template" section, you can choose different fonts to create your own personalized electronic signature. At present, there are three fonts available, namely imitation Song font, italic font and square black font, and you can choose to make square or rectangular electronic signatures.

Once the electronic signature is created, the electronic signature can be used to sign a document or contract. How about making an electronic signature with a mobile phone, is it very simple? You can also give it a try!

It has become a trend to approve office and business on mobile devices such as mobile phones or tablets, so it is also necessary to implement electronic signatures on mobile devices and ensure that mobile devices are complete.

Ways to make an electronic signature on your phone:Tools Ingredients: Xiaomi 10, MIUI Office.

2. In the PDF tool, find the PDF signature option.

3. Click on the Select Document option at the bottom of the page.

4. Open the document we need to sign.

5. Once you have opened the document, click on the Create Signature option.

6. In the area where the signature is drawn, write your name.