Method Object

The method object, nested within encryptionInformation, describes the symmetric encryption algorithm and parameters used to encrypt the payload.

Example

"method": {
  "algorithm": "AES-256-GCM",
  "isStreamable": true,
  "iv": "D6s7cSgFXzhVkran" // Base64 encoded IV
}

Fields

Parameter	Type	Description	Required?
algorithm	String	The symmetric encryption algorithm used. AES-256-GCM is the recommended and commonly implemented algorithm.	Yes
isStreamable	Boolean	Indicates if the payload was encrypted in segments suitable for streaming decryption. If true, integrityInformation MUST contain segment details.	Yes
iv	String	The Base64 encoded Initialization Vector (IV) used with the symmetric algorithm. MUST be unique for each TDF encrypted with the same key. For AES-GCM, typically 12 bytes (96 bits).	Yes