Computer Science – 17.1 Encryption, Encryption Protocols and Digital Certificates | e-Consult
17.1 Encryption, Encryption Protocols and Digital Certificates (1 questions)
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Digital certification plays a crucial role in establishing trust and verifying the identity of entities involved in digital communication. It ensures data integrity, authenticity, and non-repudiation. This is achieved through the use of Public Key Infrastructure (PKI).
Key Components of a Digital Certificate:
- Subject Information: Contains information about the entity the certificate is issued to (e.g., name, organization, email address).
- Public Key: The entity's public key, used for encryption and signature verification.
- Issuer Information: Details about the Certificate Authority (CA) that issued the certificate (e.g., name, organization).
- Serial Number: A unique identifier for the certificate.
- Validity Period: Specifies the dates during which the certificate is valid.
- Digital Signature: The CA's digital signature, verifying the authenticity and integrity of the certificate itself. This is created using the CA's private key.
Contribution to Security and Integrity:
- Authentication: Verifies the identity of the sender, ensuring the recipient knows who they are communicating with.
- Data Integrity: Ensures that data has not been altered during transmission. Digital signatures are used to detect any tampering.
- Non-Repudiation: Prevents the sender from denying they sent a message. The digital signature provides proof of origin.