Amazon S3 will now encrypt data by default

Amazon’s cloud storage Simple Storage Service (S3) now encrypts all new objects added on buckets server-side at no extra cost.

In an announcement on the Amazon Web Services (AWS) blog, the company claimed that while encryption had always been easy to enable, administrators always had to be mindful of the feature, whereas now the encryption process is “zero click”, with no impact on performance.

Existing Amazon S3 customers can verify that their objects are encrypted in the S3 section of the AWS management console, and confirm the change by configuring AWS CloudTrail to log data events, albeit at an additional cost.

AWS Encryption

Amazon S3’s default encryption method, SSE-S3, uses the AES-256 standard, which has been an optional feature of Amazon S3 since 2011, as a default. Here, Amazon generates and manages the keys, with no action required from an end user.

In the announcement, Sébastien Stormacq, a Senior Developer Advocate at AWS, wrote that “the opt-in nature of SSE-S3 meant that you had to be certain that it was always configured on new buckets and verify that it remained configured properly over time.” 

“For organizations that require all their objects to remain encrypted at rest with SSE-S3, this update helps meet their encryption compliance requirements without any additional tools or client configuration changes.”

For advanced users looking for more control over the encryption process, the service also offers customer-provided encryption keys (SSE-C), AWS Key Management Service keys (SSE-KMS), as well as client-side encryption, via a library such as the Amazon S3 encryption client, as means to protect data. 

Many IT admins will appreciate the variety of ways to keep data secure, the straightforward nature of SSE-S3, requiring no additional knowledge (and now input) on their part may appeal to smaller businesses looking to keep data safe.

According to Amazon, the change has been rolled out across all regions where AWS is available. Existing customers can also retroactively encrypt data by following instructions in a separate AWS blog post

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