1) A natural person can apply for a personal digital certificate at a branch of the relevant bank or e-government certification service institution, and he/she needs to bring his/her identity document and keep the video materials and personal signature. (2) Local enterprises can apply for the digital certificate of organization at the local institute of standards and technology, and they need to bring the business license, organization code certificate, legal representative ID card, handler ID card and other originals, and affix the official seal on the application form. Five ways to apply for a digital certificate: (1) A natural person can apply for a personal digital certificate at a branch of a relevant bank or an e-government certification service agency, and he/she must carry his/her identity document with him/her, and keep video materials and personal signature. (2) Shenzhen local enterprises can apply for the digital certificate of organization in shenzhen institute of standards and technology, and they need to bring the original business license, organization code certificate, legal representative's ID card, agent's ID card and so on, and affix the official seal on the application form.

Digital certificates are issued by an authoritative and impartial third party organization, namely CA Center. The encryption technology with digital certificate as the core can encrypt and decrypt the information transmitted on the network, digitally sign and verify the signature, thus ensuring the confidentiality and integrity of the information transmitted on the network, the authenticity of the identity of the transaction subject and the undeniable signature information, thus ensuring the security of network applications.