Public Key Infrastructure (PKI) is a framework that uses asymmetric cryptography to secure electronic communications over the internet. It involves a pair of keys: a public key for encryption and a private key for decryption. PKI includes elements like Digital Certificates, Certificate Authorities (CAs), and Registration Authorities (RAs), which together ensure data integrity, authenticity, and confidentiality. Its applications range from secure email to online banking and website security.
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PKI utilizes two keys, a public key for encryption and a private key for decryption, to ensure secure electronic communication
Digital Certificates
CAs issue digital certificates to verify the ownership of public keys, which act as electronic credentials for individuals or entities online
Registration Authority (RA)
RAs assist in the identity verification process before a certificate is issued by the CA
The combination of asymmetric cryptography, digital certificates, and CAs and RAs creates a robust infrastructure for secure digital communication and data exchange
PKI plays a pivotal role in establishing a secure and trustworthy digital environment by securing online transactions, encrypting communications, and authenticating users and devices
The operational workflow of PKI involves a user requesting a digital certificate, the RA verifying their identity, and the CA issuing a certificate associating their public key with their identity
The underlying cryptographic principles of PKI, such as the use of large prime numbers, ensure that data encrypted with a public key can only be decrypted by the corresponding private key
PKI enables secure digital interactions, such as encrypted transactions on e-commerce websites, by utilizing components such as SSL certificates to authenticate websites and establish secure connections for data exchange
PKI technology allows senders to encrypt messages with the recipient's public key, ensuring only the intended recipient can decrypt the message
Websites use SSL/TLS certificates to confirm their authenticity and encrypt data transmitted between a user's browser and the website server
PKI underpins secure network protocols such as HTTPS, VPNs, SSH, and code signing, ensuring data integrity, authenticity, and confidentiality across the internet
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In PKI, a ______ encrypts information, while a ______ is used for decryption, and these keys are part of asymmetric cryptography.
public key
private key
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A ______ issues digital certificates to affirm the ownership of public keys, and a ______ may help with identity checks before issuance.
Certificate Authority (CA)
Registration Authority (RA)
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Role of PKI in secure online transactions
PKI provides digital certificates to authenticate identity, ensuring secure transactions between parties.
