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What is Encryption at rest?

Encryption at rest protects data that is not in transit but is sitting idle. We can best envision encrypted data at rest as protected money in a bank branch vault.

It is no longer in travel to another branch, but is instead immobile in one location. As symmetric encryption avoids the transmission risk that asymmetric encryption addresses, it is a secure solution.

Unless an attacker gets access to the encryption key(s), encrypted data on disk stays encrypted. Encryption at rest will protect sensitive data in a hard drive. Or it protects a database file that is open to attack.

MongoDB Enterprise has encryption at rest. This provides a layer of security to the database. This will ensure that the written files for storage are only available after being decrypted by an authorized process or application.

MongoDB Atlas comes standard with built-in encryption at rest for disks on every node in a cluster. However, we may use the WiredTiger storage engine to allow extra encryption.

This feature enables us to employ the key management service (KMS) of our selected cloud provider. A key management service (KMS) is a tool that centralizes the administration of all encryption keys.

Types of data at rest encryption available in MongoDB Atlas

MongoDB Atlas supports two forms of data at rest encryption:

1. Customer-managed keys (CMK) encryption at rest:

   We can control the keys used to encrypt and decode the data with this option. We can utilize keys we give or keys provided by a third-party key management provider.

   We have complete control over the keys with this option and can manage them via the Atlas interface or API.
2. Rest encryption with AWS KMS-managed keys:

   This option allows us to manage the encryption keys using AWS Key Management Service (KMS). AWS KMS maintains and rotates the keys automatically with this option.

   If we are already utilizing AWS KMS to handle the keys, this method is suggested.

Regardless of the option we pick, data at rest encryption in MongoDB Atlas protects the data against unauthorized access, even if an attacker obtains access to the database.

In addition, MongoDB Atlas includes additional security capabilities like as network security, user authentication and authorization, and auditing to assist assure the security of your data.

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Conclusion

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