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."],[[["This webpage provides documentation for the `SourceEncryptionKey` struct within the Google Cloud Storage C++ client library, detailing its use in managing customer-supplied encryption keys (CSEK)."],["The `SourceEncryptionKey` is used as an optional parameter specifically in rewrite operations to define the encryption key for the source object, ensuring the protection of data in Google Cloud Storage (GCS)."],["The documentation lists multiple versions of the library, ranging from 2.11.0 to the latest release candidate 2.37.0-rc, allowing developers to find information relevant to their specific version."],["Developers can generate `SourceEncryptionKey` parameters from either a binary key using `FromBinaryKey()` or a base64-encoded key using `FromBase64Key()`, both of which must be 32 bytes in length when decoded."],["It is crucial for developers to save and protect customer-supplied encryption keys, as the data is not recoverable without them, and the documentation links to more information on Customer Supplied Encryption keys."]]],[]]
