# Abbreviations
<a name="kms-abbreviations"></a>

The following list illuminates abbreviations referenced in this document.

**AES**  
Advanced Encryption Standard

**CDK**  
customer data key

**DK**  
domain key

**ECDH**  
Elliptic Curve Diffie-Hellman

**ECDHE**  
Elliptic Curve Diffie-Hellman Ephemeral

**ECDSA**  
Elliptic Curve Digital Signature Algorithm

**EKT**  
exported key token

**ESK**  
encrypted session key

**GCM**  
Galois Counter Mode

**HBK**  
HSM backing key

**HBKID**  
HSM backing key identifier

**HSM**  
hardware security module

**RSA**  
Rivest Shamir and Adleman (cryptologic)

**secp384r1**  
Standards for Efficient Cryptography prime 384-bit random curve 1

**SHA256**  
Secure Hash Algorithm of digest length 256-bits