An optional parameter to set the Customer-Supplied Encryption key.
Application developers can generate their own encryption keys to protect the data in GCS. This is known as a Customer-Supplied Encryption key (CSEK). If the application provides a CSEK, GCS does not retain the key. The object data, the object CRC32 checksum, and its MD5 hash (if applicable) are all encrypted with this key, and the key is required to read any of these elements back.
Care must be taken to save and protect these keys, if lost, the data is not recoverable. Also, applications should avoid generating predictable keys, as this weakens the encryption.
This option is used in read (download), write (upload), copy, and compose operations. Note that copy and compose operations use the same key for the source and destination objects.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-04-22 UTC."],[[["This document provides reference information for `EncryptionKey` across multiple versions, ranging from 2.11.0 to the latest release candidate 2.37.0-rc, with links to each version's documentation."],["Customer-Supplied Encryption Keys (CSEK) allow application developers to encrypt data in GCS using their own keys, which GCS does not retain."],["CSEK is used in various operations like read, write, copy, and compose, and losing these keys will render the data unrecoverable, meaning that their protection is paramount."],["The document details two static methods, `FromBinaryKey` and `FromBase64Key`, for creating an encryption key from binary and base64-encoded keys respectively, requiring exactly 32 bytes."],["The static method `prefix()` is also included as a point of reference, though it is not fully detailed."]]],[]]
