Title	Bartering Method for Improving Privacy of LBS
Author	Abdullah M Basahel, Adnan Ahmed Abi Sen, Mohammad Yamin, Sarah Alqahtani
Citation	Vol. 19  No. 2  pp. 207-213
Keywords	Privacy, Security, LBS, POI, Bartering

Title	Analysis of Cloud Security Vulnerabilities and Countermeasures
Author	Hyun-Min Son, Nak-Keun Joo, Hyun-Taek Choi, Hyun-Cheol Lee
Citation	Vol. 19  No. 2  pp. 200-206
Keywords	Attack, Cloud Compyting, Security, Threats, Vulnerability.

Title	Security Challenges and Limitations in IoT Environments
Author	Suha Ibrahim Al-Sharekh, Khalil H. A. Al-Shqeerat
Citation	Vol. 19  No. 2  pp. 193-199
Keywords	Internet of Things, Security, Challenges, Limitations, Survey.

Title	A Review on Synchronization and Concurrency Control Techniques of Distributed Databases
Author	Sajawal ur Rehman Khan, Muhammad Sheraz Arshad Malik, Muhammad Waleed Ashraf, Ayesha Saif Ullah, Ikraam Asghar, Nafeesa Razzzaq
Citation	Vol. 19  No. 2  pp. 187-192
Keywords	Distributed Database, Synchronization, Concurrency Control, Clock synchronization, Locking, Timestamp.