Patent attributes
A method of a security system to provide access by a requester to an encrypted data object stored in an object store, the requester being authenticated by the object store, the method comprising: receiving, from the object store: the encrypted object having associated an object identifier; and an identifier of the requester; deriving a first cryptographic key to decrypt the object; deriving a second cryptographic key; re-encrypting the object based on the second key and communicating the re-encrypted object to the requester; wherein each of the first and second keys are based on the object identifier, the requester identifier and a secret key portion generated by the security system, the secret key portion being different for each of the first and second keys, the method further comprising: in response to a second authentication of the requester by the security system, communicating the secret key portion for the second key to the requester.
