What cipher mode is used for Elasticache encryption at rest?
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I am currently working through some due diligence for use of Elasticache for Redis. I need to understand the encryption standard used and cypher mode.
The following AWS whitepaper references Elasticache uses AES-512 standard for encryption at rest
This page highlights it now meets AES256 standards.
I am not a cryptography expert but as I understand it, the biggest block size for AES is 256. Ignoring the AES standard. I am more interested in the cypher mode at this stage.
Does anyone know cypher mode is used? is it XTS?
asked 3 months ago7 views
1 Answers
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Accepted Answer
See this whitepaper on encryption in AWS: AWS KMS Cryptographic Details
"Each volume is encrypted using AES-256-XTS. This requires two 256-bit volume keys, which you can think of as one 512-bit volume key. "
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