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 2025-04-02 UTC."],[[["The page provides documentation for the `SourceEncryptionKey` structure in the Google Cloud Storage C++ library, detailing its use in managing Customer-Supplied Encryption Keys (CSEK)."],["The documentation lists the availability of `SourceEncryptionKey` across multiple versions of the library, from version 2.11.0 to 2.37.0-rc."],["CSEK allows developers to encrypt data in Google Cloud Storage using their own keys, enhancing data security, however, losing these keys will render the data irrecoverable."],["The `SourceEncryptionKey` is applicable to rewrite operations and is used for the source object's encryption."],["The page details the `FromBinaryKey` and `FromBase64Key` functions for creating encryption key parameters, along with their requirements, and also has a `prefix` function."]]],[]]
