Manzoor, A. ., Wahid, A. ., Ali Shah, M. ., Akhunzada, A. . and Fayyaz Qureshi, F. . (2017) “Secure Login Using Multi-Tier Authentication Schemes in Fog Computing”, EAI Endorsed Transactions on Internet of Things, 3(11), p. e5. doi: 10.4108/eai.26-3-2018.154382.