EBS Encryption Flashcards
What is EBS Encryption?
EBS Encryption is a method for securing data on Amazon EBS volumes by encrypting the volume and any snapshots created from it. Encryption and decryption are handled transparently, and it uses keys from AWS Key Management Service (KMS) to protect the data.
How does EBS Encryption work?
EBS Encryption works by encrypting the data at rest, the I/O between the volume and the instance, and all snapshots created from the volume. Encryption and decryption are managed seamlessly, ensuring data is encrypted as it moves to and from the storage.
What is AWS KMS?
AWS Key Management Service (KMS) is a managed service that makes it easy for you to create and control the encryption keys used to encrypt your data. AWS KMS is integrated with EBS Encryption to manage the keys used for encrypting EBS volumes.
Can existing EBS volumes be encrypted?
Yes, existing EBS volumes can be encrypted by creating a snapshot of the volume and then creating a new encrypted volume from that snapshot. Direct encryption of an existing volume is not supported.
How are EBS snapshots affected by encryption?
Snapshots taken from an encrypted EBS volume are automatically encrypted. Similarly, any volumes created from these encrypted snapshots are also encrypted, maintaining data security throughout the lifecycle.
What is the performance impact of using EBS Encryption?
The performance impact of using EBS Encryption is minimal. AWS uses optimized encryption libraries that ensure data is encrypted and decrypted with negligible performance overhead.
Is EBS Encryption available in all AWS regions?
As of my last update, EBS Encryption is available in all AWS regions. However, AWS continuously expands its services, so it’s a good practice to check the current AWS documentation for the most up-to-date information.
Can I use my own encryption keys for EBS Encryption?
Yes, you can use your own encryption keys managed through AWS KMS. This allows you to control access to the keys and audit their use, providing additional security and compliance capabilities.
How does EBS Encryption affect the cost of using EBS?
EBS Encryption does not add any additional cost for encrypting your volumes or snapshots. However, AWS charges for the use of AWS Key Management Service (KMS) if you choose to create and use your own customer managed keys.
What are the best practices for using EBS Encryption?
Best practices for using EBS Encryption include always encrypting sensitive data, using customer managed keys for greater control, regularly rotating keys, and auditing access to the keys to ensure that your data remains secure.
