appliedcrypto/unit06_trust_dig_cert

Unit 6: Trust and Digital Certificates

The key concepts are:

• Digital Certificate: Usage, formats, and PKI.
• Creation of the trust infrastructure.

You can find examples of digital certificates here.

What you should know at the end of unit?

• Understand the trust infrastructures of PKI.
• Define certificate signing requests for the generation of certificates.

Presentations

• Week 7 Presentation (PDF) - Digital Certs: here.
• Week 7 Presentation (video) - Digital Certs: here.
• Doodle: here

Lab

• Unit 6 Lab (PDF): here.
• Unit 6 Lab (video) - Digital Certs: here.

Sample Exam Questions

The following are sample questions on digital certificates:

• Bob has just produced a key pair, in a Base-64 format, and now wants to send this to Alice. What advice would you give him on sending the key pair to Alice?
  • Where would I find this info? Have a think about the certificate which is distributed. You can observe it here.
• Bob sends an encrypted message to Alice, and also sends his digital certificate to Alice to prove his identity. How does Alice prove that it is Bob who sent the message?
• Your CEO calls you and is unhappy that your company's Web site has received a F grade on SSLLab, and that it is highlighting a problem with the digital certificate on the site. What problem(s) related to the digital certificate might cause the site to have such a poor rating?

Any questions?

We are on Teams, here.