A Machine-Checked Proof of Security for AWS Key Management Service
Published in ACM Conference on Computer and Communications Security (CCS) London, UK 2019, 2019
Recommended citation: José Bacelar Almeida, Manuel Barbosa, Gilles Barthe, Matthew Campagna, Ernie Cohen, Benjamin Grégoire, Vitor Pereira, Bernardo Portela, Pierre-Yves Strub and Serdar Tasiran, A Machine-Checked Proof of Security for AWS Key Management Service. ACM Conference on Computer and Communications Security (CCS) London, UK 2019
Abstract: We present a machine-checked proof of security for the domain management protocol of Amazon Web Services’ KMS (Key Management Service) a critical security service used throughout AWS and by AWS customers. Domain management is at the core of AWS KMS; it governs the top- level keys that anchor the security of encryption services at AWS. We show that the protocol securely implements an ideal distributed encryption mechanism under standard cryptographic assumptions. The proof is machine-checked in the EasyCrypt proof assistant and is the largest EasyCrypt development to date.