Final answer:
A digital certificate contains a public key and verifies the identity of a person or entity online, issued by a trusted Certification Authority.
Step-by-step explanation:
The type of electronic document that contains a public key is known as a digital certificate. A digital certificate, also referred to as a digital ID, is used to verify the identity of a person or entity online. It is issued by a trusted entity called a Certification Authority (CA). The certificate includes the public key as well as information about the identity of the key holder. This is essential for secure communication on the internet because it allows others to encrypt messages in such a way that only the holder of the paired private key can decrypt and read them.
The correct answer is a) digital certificate. A digital certificate is an electronic document that contains a public key. It is used to verify the authenticity of the sender and establish secure communication. Digital certificates are commonly used in online transactions, secure websites, and email encryption. They play a crucial role in ensuring the security of online communication by encrypting data and verifying the identity of the parties involved.