SSL Complete Guide 2021: HTTP to HTTPS - Asymmetric Keys Overview

The video tutorial discusses encryption and hashing algorithms, focusing on asymmetric keys. It explains the concept of asymmetric keys, which consist of a private and a public key, and their distinct roles. The private key is kept secret, while the public key is shared openly. The tutorial outlines two primary uses for asymmetric keys: encryption, where the public key encrypts data and the private key decrypts it, and digital signing, where the private key signs data and the public key verifies the signature. The video concludes with a brief mention of the next lecture's focus on encryption using asymmetric keys.

What is the primary difference between symmetric and asymmetric keys?

• Symmetric keys use two keys, while asymmetric keys use one.

• Symmetric keys use one key, while asymmetric keys use a pair of keys.

• Symmetric keys are public, while asymmetric keys are private.

• Symmetric keys are longer than asymmetric keys.

Why is the private key in an asymmetric key pair kept secret?

• To ensure that only the owner can decrypt data encrypted with the public key.

• To allow anyone to encrypt data with it.

• To make it easier to share with others.

• To prevent it from being used for encryption.

What is a key characteristic of the public key in an asymmetric key pair?

• It is used to sign data.

• It is publicly available and can be shared with anyone.

• It is used to decrypt data.

• It is kept secret and only known to the owner.

What is one of the main uses of a public key in an asymmetric key pair?

• To generate a private key.

• To decrypt data.

• To encrypt data.

• To sign data.

How can the authenticity of a signed message be verified in an asymmetric key system?

• By using a hash function to verify the signature.

• By using the private key to verify the signature.

• By using a symmetric key to verify the signature.

• By using the public key to verify the signature.