This setting involves determining the network, selecting the scheme, configuring the equipment, and generating the signature.

1. Determine the computer network where you want to set the SPA security code, and ensure that you have administrator rights.

2. Understand and choose the SPA security code scheme suitable for your network. This may include using predefined digital signature algorithms, generating random digital signatures, or using cryptographic hash functions.

3. Configure your network device or server to support the SPA security code. This may include installing necessary software or hardware, configuring network protocols or setting specific security parameters.

According to the selected SPA security code scheme, a digital signature is generated. This usually involves the use of private keys and public key encryption technologies. Private keys are used to generate digital signatures and public keys are used to verify the validity of signatures.