First of all, we need to understand the function of signature. The third edition of S60 has greatly improved the security, and has stricter regulations on the installation and operation of third-party software in the system. Some operations involving mobile phone software and hardware security/personal information security are particularly restricted (for example, automatic startup of mobile phone startup is one of the restricted functions). In order to realize these "specially restricted" functions, the application must obtain a "signature". In other words, someone should be responsible for the safety of this operation! A program without any signature cannot be installed and run.
Signature: It refers to writing specific tag information in a specific field of an application, indicating that the software has passed the audit of the signer.
The signer is responsible for the security of the software. Among them, there are three kinds of signatures:
1.Symbian signature.
Which is the official signature of Symbian mobile phone operating system. Software that has passed Symbian security certification will get Symbian.
Sign. This software has the highest security level. Can be installed/run normally on the mobile phone/and can realize all the functions provided by the software.
Obtaining Symbian signature requires the software author to deal directly with Symbian officials. For various reasons,
Not all software authors have the ability to obtain this certification.
2. Signature of the author.
The author of the software signed his name when he released the software. This kind of software can be installed and run on the mobile phone (it may encounter security problems).
Sex warning, can be skipped). But those "specially restricted" functions cannot be realized. If a piece of software doesn't involve such a function at all, then
It is entirely possible for the software author to sign by himself. Another possibility is that although some functions of the software are "specially restricted"
Range, but not the main function. The author of the software may also publish an "author's signature version", and most of them can be used under normal circumstances.
Function, but some specific functions will be lost. For example, there is such a version of the "incoming call" software, almost all functions can be used, but not.
Boot up.
3. User signature. (It is the kind used in the certificate area now. At least read this paragraph. )
Strictly speaking, this should belong to the "developer signature". Because Symbian provides a kind of "development certificate" for software developers, the original intention is
It is software developers who do software testing. This "development certificate" is associated with the IMEI code of the machine used for testing. Use this
The software signed by certificate can only be used on the machine corresponding to IMEI code, but not on other machines.
Our so-called "self-signature" is actually in this way. To put it bluntly, you said that you develop software and you provide your tester.
IMEI code, Symbian gives you a "development certificate", and you use this certificate to sign your "test software". You are right about yourself.
Responsible for "development behavior"! That's all. In addition, the development certificate is valid for half a year from the date of issuance, but it is signed within the validity period of the certificate.
There is no limit to the use time of the program.
If you want to sign, you can apply for a new certificate and signing tool in Saipan Forum.