Title	Preventing Multiple Accessing Attacks via Efficient Integration of Captcha Crypto Hash Functions
Author	Nafisah Kheshaifaty and Adnan Gutub and Adnan Gutub
Citation	Vol. 20  No. 9  pp. 16-28
Keywords	Access control; authentication; captcha; cryptography; encryption; hashing

Title	Gender and Age Estimation at Distance in Smart Cities Surveillance: A cascaded Deep Learning-Based Approach
Author	Yahia Said
Citation	Vol. 20  No. 9  pp. 9-15
Keywords	Gender estimation, Age estimation, Smart city surveillance, Deep Learning, Face detection, Generative Adversarial Network

Title	Security Issues in Decentralized Internet Blockchain and Secure Energy Trading
Author	Abdullah Bajahzar
Citation	Vol. 20  No. 9  pp. 1-8
Keywords	Decentralized Internet, Blockchain, Security, Cryptocurrency

Title	Android OS Information Security Level Assessment
Author	Pavlo Chernenko and Maria Orlova
Citation	Vol. 20  No. 8  pp. 242-248
Keywords	Android, information security, malicious impact, mobile OS, protection instruments.