1. Smartphone users 2026, Statista. https://www.statista.com/statistics/330695/number-of-smartphone-users-worldwide. Accessed Nov. 23 2021
2. Chee, K.: Global increase in mobile malware but smartphone security lax in S’pore. The Straits Times, Singapore, Jul. 05, 2021. https://www.straitstimes.com/tech/tech-news/global-increase-in-mobile-malware-but-smartphone-security-lax-here. Accessed: Nov. 23, 2021
3. OWASP Mobile Top 10. https://owasp.org/www-project-mobile-top-10/. Accessed Nov. 30, 2021
4. Nokia Threat Intelligence Report: Network Security, vol. 2018, no. 12, p. 4, Dec. 2018 10.1016/S1353-4858(18)30122–3
5. Altuwaijri, H., Ghouzali, S.: Android data storage security: a review. J. King Saud Univ. - Comput. Inf. Sci. 32(5), 543–552 (2020). https://doi.org/10.1016/j.jksuci.2018.07.00