S3 Bucket Data Encrypted When Upload Object in Bucket
by Jenelle Kemp, Technical Product Director, Logicworks
Everyone wants to keep their information condom. How can you make certain that the files you or your company have uploaded to the cloud are protected?
The need for encryption has become foundational as companies motility from private data centers to the cloud. Information technology is a requirement for most compliance standards and may provide legal cover if in that location is a breach in security.
However, many organizations run into problem when their deject storage contains a confusing mix of unencrypted and encrypted files – and no idea how they got that style or how to begin fixing the trouble. How tin you exist sure that each of your files is stored in an encrypted format?
S3 Bucket Encryption
What is S3 encryption? The simplest caption is that it is a method of protecting data at rest. There are other methods of protecting information in transit, but many regulatory agencies require that files in storage ("at remainder") in the deject are stored in an encrypted format to protect them in case bad actors proceeds unauthorized access. Even if you are not required by regulations to encrypt your data, taking boosted steps to protect it via encryption may provide legal comprehend if at that place is a breach in security. By encrypting information you tin prove that you took boosted steps to protect sensitive information.
The simplest way to encrypt files is to accept Amazon Web Services (AWS) exercise information technology for y'all! On Amazon Spider web Services Simple Storage Service (S3 for curt) the files are called objects and the containers they live in are chosen buckets. When you starting time set up your S3 buckets yous have the option to add encryption to all new objects added to that bucket. This ensures every object is encrypted upon upload to that bucket.
Starting out with an empty saucepan with encryption set up from the outset is the ideal solution – but unfortunately most companies do not experience this situation. The problem is that enabling encryption on a bucket only affectsnew objects added to it from that point forward. Itdoesnot affect any existing objects inside that saucepan. If you lot have inherited an existing bucket that did not have automatic encryption gear up from the beginning, there is likely a combination of encrypted and unencrypted objects inside the that bucket.
Let's say y'all started working for your visitor in Jan 2019. Your department relies on a heavily used bucket containing hundreds of thousands of objects. Your predecessor enabled default encryption on this bucket at some point in 2018 but the bucket itself was in utilize for many years earlier then. When your predecessor enabled default encryption they causeless it would encrypt whatsoever objects already in that location – however you know differently considering you read this blog mail service! You likewise know that some of the pre-2018 data was already encrypted before upload, so you tin can't assume that everything before that date is unencrypted. Now an audit is looming and the CTO is asking for proof that all files in this bucket are encrypted. What can you do?
Pace ane: Identify objects missing encryption
The beginning pace to protecting those unencrypted files is to find them. Yous can use Amazon's S3 Inventory to generate a list of objects missing encryption.
Annotation before beginning: Amazon S3 metadata only considers AES-256 and AWS-KMS as encryption methods. If your arrangement uses a different type of encryption this method will not piece of work.
- Use S3 Inventory to obtain a list of objects in the target bucket. There are a few methods of doing this, so review the S3 Inventory documentation to see which works best for your environment.
- When your listing is generated, search for the Encryption Condition metadata field. There are a few options for status, but the one nosotros are interested in isNot-SSE.
- Filter out all objects except for those containing theNon-SSE flag.
- The resulting list contains all objects without encryption in the target bucket.
Another option for identifying unencrypted objects is to use Logicworks' Information Loss Prevention, which provides a set up of tools that will identify and send notifications about S3 objects that are unencrypted in your AWS account.
Step 2: Add encryption to existing S3 objects
In one case you know which objects in the bucket are unencrypted use one of the following methods for adding encryption to existing S3 objects.
Option one
Modest numbers of objects or single files may be encrypted 1 at a time in the Amazon S3 console.
- Sign into the AWS Management Console.
- Navigate to the S3 console and find the bucket and object that was flagged as unencrypted.
- Select the object and choose Backdrop then Encryption.
- Utilise the wizard to choose the S3 encryption options you lot prefer.
- Relieve to employ encryption to the object.
Annotation: An in-depth caption of unmarried file encryption may be found on the AWS documentation.
Option ii
Post-obit the single-file procedure for many hundreds or thousands of unencrypted objects can be overwhelming, so we recommend a different strategy to encrypt multiple objects. Encrypting multiple objects can create an enormous corporeality of costly logging, so temporarily disabling logging is a good idea before beginning this procedure.
- Disable S3 access logging (if enabled)
- Navigate to the bucket containing multiple unencrypted objects and select Properties then Server Admission Logging
- Choose Disable logging
- Identify the bucket containing multiple unencrypted objects and set up default encryption in the bucket policy.
- Once the bucket has default encryption enabled, any new objects entering the saucepan will be encrypted. In order to encrypt the existing objects you lot will need them to be considered "new" to the bucket. Yous tin accomplish this in 1 of two ways:
- Motion unencrypted objects to a temporary bucket and and then motility objects from temporary bucket back to original bucket.
- Apply the AWS command line interface to do a recursive copy of all objects inside a S3 bucket. Warning: Object metadata may be lost using the AWS copy command, consult AWS CLI documentation for more than data.
Once this process is complete you may re-enable logging on these buckets.
Option 3
The experts at Logicworks created a Data Loss Prevention service to make this process much more uncomplicated and easy to achieve. Nosotros tin help you lot:
- Detect any unencrypted objects
- Automatically notify you when whatever new unencrypted objects appear
- Search for objects containing any sensitive data (including addresses, social security numbers, or other personally identifying information)
- …All without giving more work to your in-house team
Although this process may be cumbersome, S3 encryption is a slap-up way to protect confidential data. By taking steps to evaluate and encrypt all files you can ensure that your stored data meets encryption compliance. If y'all accept whatsoever questions about our information loss prevention options or S3 data encryption, delight larn more about Logicworks Data Loss Prevention or contact us and we would dear to hash out your options!
Source: https://www.logicworks.com/blog/2019/04/how-to-encrypt-existing-amazon-s3-objects-with-s3-encryption/
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