Digital signatures can be created by individuals or organizations who possess a digital certificate issued by a trusted Certification Authority (CA). The process of obtaining a digital certificate typically involves the following steps:

1. Generate a key pair: The person or organization intending to obtain a digital signature must generate a pair of cryptographic keys—a private key and a corresponding public key. The private key should be kept secure and not shared with anyone.
2. Apply for a digital certificate: The individual or organization needs to apply to a trusted Certification Authority (CA) to obtain a digital certificate. The CA is responsible for verifying the identity of the applicant and issuing the digital certificate.
3. Identity verification: The CA performs a verification process to confirm the identity of the applicant. This can involve various methods, such as checking government-issued identification documents, conducting in-person verification, or using other trusted means of authentication.
4. Certificate issuance: Once the CA has verified the identity of the applicant, they issue a digital certificate. The digital certificate contains the public key of the applicant and is digitally signed by the CA, ensuring its authenticity.
5. Usage of the digital certificate: With the digital certificate in hand, the individual or organization can now use it to create digital signatures. They can sign digital documents, emails, or other electronic communications using their private key, and recipients can verify the signatures using the corresponding public key contained in the digital certificate.

It’s worth noting that the process of obtaining a digital certificate may vary depending on the CA and the specific requirements in different jurisdictions. Additionally, some countries may have specific regulations or guidelines regarding the usage of digital signatures.