An optional parameter to set the Customer-Supplied Encryption key for rewrite source object.
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 only in rewrite operations and it defines the key used for the source object.
[[["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."],[[["The webpage provides documentation for the `SourceEncryptionKey` structure across multiple versions, ranging from 2.11.0 to the latest release candidate 2.37.0-rc."],["This feature enables the use of Customer-Supplied Encryption Keys (CSEK) for data protection in Google Cloud Storage (GCS), where developers manage their own encryption keys."],["`SourceEncryptionKey` is specifically used during rewrite operations to specify the encryption key for the source object."],["The `SourceEncryptionKey` can be created using a binary key (32 bytes) or a base64-encoded key (32 bytes when decoded), and it must be saved and protected by the application developer to ensure data access."],["The webpage provides reference to external documentation for detailed information about CSEK."]]],[]]
