Table 4.

Technologies and standards that can be leveraged in the development of a secure image-sharing infrastructure

	Requirements	Available technology or standards
Data transformation	De-identification	CTP DICOM anonymization
	Research identifier	IHE PIX
	Privacy preserving transformation	application specific
	Encryption	X509 certificate, XML encryption, and PGP
	Signature	X509 certificate, XML signature, MD5/SHA1 sum
	Honest broker
Infrastructure	Policy management	XACML
	User identity management	LDAP, active directory, OpenID, caGrid Dorian
	User role and attribute management	LDAP, active directory, caGrid GridGrouper
	Authentication	SAML, WS-Trust, DICOM, caGid Dorian
	Audit log management	IHE ATNA schema
	Trust management	caGrid grid trust service
Data access and movement	Authorization	SAML, OAuth
	Delegation	caGrid certificate delegation service
	Audit logging	IHE ATNA profile
	Non-repudiation
	Transmission protection	WS-Security, HTTPS