Public-Key Infrastructure Summary
- Ensures secure electronic communication through cryptographic keys.
- Facilitates authentication, confidentiality, integrity, and non-repudiation.
- Utilizes asymmetric cryptography involving public and private keys.
- Incorporates components like digital certificates, Certificate Authorities (CAs), and registration authorities (RAs).
- Crucial for secure online transactions, data exchange, and blockchain technology.
Public-Key Infrastructure Definition
Public-Key Infrastructure (PKI) is a framework of policies, technologies, and procedures that enables secure electronic communication and data exchange using cryptographic keys.
PKI uses asymmetric cryptography, involving a pair of keys (public and private) to authenticate parties, ensure data integrity, and provide confidentiality and non-repudiation.
What Is Public-Key Infrastructure?
Public-Key Infrastructure (PKI) is a comprehensive system designed to manage digital keys and certificates.
It provides the means for secure electronic transactions and communication by employing asymmetric cryptography.
PKI ensures that data exchanged over networks is confidential and tamper-proof.
Who Uses Public-Key Infrastructure?
A wide range of entities, including governments, financial institutions, and corporations, utilize PKI.
Individuals also use PKI for secure email communication and online transactions.
Blockchain networks leverage PKI for secure transactions and identity verification.
When Is Public-Key Infrastructure Used?
PKI is used whenever secure communication or data exchange is required.
It is crucial during online banking transactions, e-commerce, and secure email communications.
PKI is also essential for verifying digital signatures and certificates in blockchain technology.
Where Is Public-Key Infrastructure Implemented?
PKI is implemented in various sectors, including finance, healthcare, and government.
It is integrated into web browsers, email clients, and blockchain networks.
PKI is also found in applications requiring secure data transmission and authentication.
Why Is Public-Key Infrastructure Important?
PKI is important because it provides a reliable way to secure digital communication.
It helps prevent unauthorized access, data breaches, and fraud.
PKI ensures that data integrity, confidentiality, and authenticity are maintained.
How Does Public-Key Infrastructure Work?
PKI works by using a pair of cryptographic keys: a public key and a private key.
The public key is openly distributed, while the private key is kept confidential.
When data is encrypted with the public key, it can only be decrypted with the corresponding private key.
PKI relies on Certificate Authorities (CAs) to issue digital certificates that verify the identity of entities.
These certificates bind public keys to individuals or entities, ensuring trust in digital transactions.
Registration Authorities (RAs) assist CAs by verifying the identity of entities before certificate issuance.
