SERIES X: DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY Secure applications and services (1) – Mobile Security Functional security requirements and architecture for mobile phone anti-theft measures. Recommendation ITU-T X.1127 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY PUBLIC DATA NETWORKS X.1–X.199 OPEN SYSTEMS INTERCONNECTION X.200–X.299 INTERWORKING BETWEEN NETWORKS X.300–X.399 MESSAGE HANDLING SYSTEMS X.400–X.499 DIRECTORY X.500–X.599 OSI NETWORKING...