Key Management and Encryption Concepts

The video tutorial provides an overview of Public Key Infrastructure (PKI), explaining its role in cryptography, including policies, procedures, and components like digital certificates and certificate authorities. It contrasts symmetric and asymmetric encryption, highlighting the use of a single key in symmetric encryption and a pair of mathematically related keys in asymmetric encryption. The tutorial covers key generation, management, and the challenges of handling keys in large organizations, emphasizing the importance of security and trust in cryptographic processes.

What is a primary function of Public Key Infrastructure (PKI)?

• To provide physical security for data centers

• To generate random numbers for cryptography

• To encrypt data using symmetric keys

• To manage and distribute digital certificates

What is a key characteristic of symmetric encryption?

• It is slower than asymmetric encryption

• It uses the same key for both encryption and decryption

• It requires a certificate authority

• It uses two different keys for encryption and decryption

What is a potential issue with symmetric encryption when scaling to many users?

• It cannot be used for encrypting large files

• It is not compatible with digital certificates

• It requires too much computational power

• It is difficult to securely share the key with many users

How are the keys in asymmetric encryption related?

• They are randomly generated without relation

• They are identical

• They are derived from a symmetric key

• They are mathematically related

What is the role of the public key in asymmetric encryption?

• To generate random numbers

• To decrypt data

• To store data securely

• To encrypt data

Why can't the private key be derived from the public key in asymmetric encryption?

• Because the public key is encrypted

• Because the private key is not shared

• Because they are stored in different locations

• Because of the mathematical complexity involved

What is a common method to protect a private key?

• Sharing it with multiple users

• Using it as a public key

• Encrypting it with a password

• Storing it in a public database

What is the purpose of key escrow in an organization?

• To store private keys securely for future access

• To encrypt data for external partners

• To generate new public keys

• To distribute public keys to users

Why might an organization need access to a user's private key after they leave?

• To continue encrypting new data

• To revoke the user's public key

• To generate new keys for other users

• To decrypt data the user worked on

What is a potential downside of handing over private keys to a third party?

• It increases encryption speed

• It may compromise data security

• It simplifies key generation

• It eliminates the need for public keys