tokens: ['Digital', 'Signature', 'Algorithm', 'ECDSA', 'and', 'the', 'Elliptic', 'Curve', 'Integrated', 'Encryption', 'Scheme', 'ECIES', 'Security', 'management', 'services', 'The', 'CME', 'manages', 'the', 'information', 'that', 'enables', 'the', 'security', 'processing', 'services', 'entity', 'to', 'determine', 'the', 'validity', 'of', 'the', 'certificates', 'and', 'the', 'received', 'data', 'This', 'includes', 'revocation', 'and', 'other', 'status', 'information', 'of', 'all', 'the', 'stored', 'certificates', 'and', 'the', 'certificates', 'that', 'can', 'be', 'used', 'as', 'trust', 'anchors', 'The', 'PSSME', 'provides', 'the', 'necessary', 'support', 'for', 'higher', 'layer', 'entities', 'that', 'request', 'to', 'be', 'advertised', 'as', 'secure', 'provider', 'services', 'In', 'particular', 'the', 'PSSME', 'communicates', 'certificates', 'and', 'private', 'keys', 'to', 'the', 'security', 'processing', 'services', 'in', 'order', 'to', 'sign', 'WSAs']