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Principle of software anti-piracy
Software anti-piracy refers to a series of technical means and measures to protect software copyright and avoid piracy. The following are some common principles of anti-piracy software:

1. Declarative authorization: When the software is installed or started, the user is required to enter the registration code or serial number to verify whether the user has legal authorization. This way can prevent illegal copying and distribution of software, and can control the service life and function of software.

2. Digital signature: When software is released, digital signature technology can be used to sign the software to ensure the integrity and authenticity of the software and prevent the software from being tampered with or maliciously modified.

3. Activation mechanism: When the software is installed or started, you need to connect to the server for activation to verify whether the user has legal authorization. This way can prevent the registration code or serial number from being stolen and control the service life and function of the software.

4. Software encryption: Before the software is released, the source code or binary code can be encrypted by encryption algorithm to prevent it from being illegally copied and distributed. This method can increase the difficulty of software cracking, but it will also increase the running overhead and maintenance cost of software.

5. Anti-debugging technology: Software can use anti-debugging technology to detect and defend the debugger and prevent hackers from using the debugger to crack the software. This method can increase the difficulty of software cracking, but it will also increase the running overhead and maintenance cost of software.

It should be pointed out that software anti-piracy technology can not completely prevent software from being pirated or cracked, but only increases the difficulty of software being pirated or cracked. Therefore, in order to better protect software copyright, software companies need to take other measures, such as strengthening legal protection, improving software quality and service level, and establishing a good market image.