Explaining Encryption in Transit on AWS S3
The aim of this page📝 is to explain encryption in transit based on the particular example of S3 buckets.
- Encryption in transit is the process of protecting data while it is being transmitted from one location to another.
- This is typically done by encrypting the data before it is sent and then decrypting it at the receiving end.
- The goal of encryption in transit is to prevent unauthorized access to the data while it is in motion.
- There are several methods for encrypting data in transit, including using secure protocols such as SSL/TLS.
- Other methods include using VPNs or other types of encrypted tunnels to protect data as it travels over a network.
- In the context of S3 buckets, encryption in transit would involve encrypting data as it is uploaded to or downloaded from an S3 bucket.
- This can be done by using secure protocols such as HTTPS or by using client-side encryption, where the data is encrypted before it is sent to the S3 bucket.
CODE
Here is a particular policy I have used:
{
"Sid": "AllowSSLRequestsOnly",
"Action": "s3:*",
"Effect": "Deny",
"Resource": [
"arn:aws:s3:::<s3_bucket>",
"arn:aws:s3:::<s3_bucket>/*"
],
"Condition": {
"Bool": {
"aws:SecureTransport": "false"
}
},
"Principal": "*"
}This policy makes sense in the context of enforcing encryption in transit for an S3 bucket. It is a Deny policy, which means that it will explicitly deny access to the specified resources if the conditions of the policy are met. In this case, the policy is denying access to all actions on the specified S3 bucket and its objects if the request is not made using a secure transport method. This means that any requests to the specified S3 bucket that are not made using SSL/TLS (i.e., HTTPS) will be denied.
By enforcing this policy, you can ensure that all data transferred to or from the specified S3 bucket is encrypted in transit, as all requests must be made using a secure transport method. This can help to protect the data from interception or tampering while it is in motion.
