How well do you know Digital Certificates?

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Questions and Answers

What is a digital certificate used for?

  • To encrypt an electronic message
  • To create a fake website
  • To hack into a user's computer
  • To verify a user's identity and bind their public key to them (correct)

What does the 'lock' icon in your browser indicate?

  • The website is fake and set up by criminals
  • The website is backed by a digital certificate and is genuine (correct)
  • The website is not secure
  • The website is under maintenance

Who can issue digital certificates?

  • Only the government
  • Random people on the internet
  • Any individual or organization
  • Certain trusted entities like Google, Symantec, and Comodo (correct)

What is a cypher?

<p>A process used to scramble data so that it doesn't make sense (B)</p> Signup and view all the answers

What is encryption?

<p>A process used to scramble data so that it doesn't make sense (D)</p> Signup and view all the answers

What is Public-key encryption (PKE)?

<p>A method of encryption that uses two keys (C)</p> Signup and view all the answers

What is the purpose of encryption in data transmission?

<p>To keep data secure (D)</p> Signup and view all the answers

What is a cypher in data encryption?

<p>A process used to scramble data (C)</p> Signup and view all the answers

How does public-key encryption (PKE) solve the problem of key exchange?

<p>It uses two mathematically linked keys (B)</p> Signup and view all the answers

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Study Notes

Digital Certificates and Encryption

  • A digital certificate is used to authenticate the identity of a website or organization, ensuring that the user is communicating with the intended entity.
  • The 'lock' icon in a browser indicates that a website has a digital certificate, and the connection is encrypted and secure.

Digital Certificate Issuance

  • Digital certificates can be issued by a trusted Certificate Authority (CA), a trusted third-party organization that verifies the identity of a website or organization.

Encryption and Ciphers

  • A cipher is an algorithm used to encrypt and decrypt data, ensuring that it remains confidential and tamper-proof.
  • Encryption is the process of converting plaintext data into unreadable ciphertext, protecting it from unauthorized access.

Public-Key Encryption (PKE)

  • Public-key encryption (PKE) is a type of encryption that uses a pair of keys: a public key for encryption and a private key for decryption.
  • PKE solves the problem of key exchange by allowing users to share their public key, while keeping their private key confidential.

Purpose of Encryption in Data Transmission

  • The purpose of encryption in data transmission is to ensure confidentiality, integrity, and authenticity, protecting data from unauthorized access, tampering, and eavesdropping.

Ciphers in Data Encryption

  • A cipher is used to encrypt and decrypt data in a secure and scalable manner, ensuring that data remains confidential and tamper-proof during transmission.

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