Table 2 Topic and research primary studies

Design

5, 21, 22, 41, 42, 51

11, 15, 23, 29, 37, 59, 70, 71, 98

2, 3, 31, 35, 62, 63, 74, 81, 90, 117, 118, 122, 130

7, 54

Service deployment

36, 72, 79, 82, 85

39

1, 4, 6, 17, 20, 30, 40, 44, 45, 56, 57, 61, 97, 104, 131

14, 16, 129,

91, 94, 120, 121,

13, 34, 119

Implementation

27, 53

33, 65, 108, 125

9, 26, 48, 52, 75, 83, 87, 95, 102, 128

46

38

Configurations

55, 64, 76,

10, 67, 126

8, 24, 68, 77, 89, 92, 109, 103,

80

Privacy

66, 78, 106, 111, 114, 123,

43, 60, 100, 101, 124, 127

58, 116

19, 115

Security

25, 28, 32, 47, 50, 69, 73, 84, 86, 93, 107, 110

49, 112,

12, 18, 88, 96, 99, 105, 113

Percentage

25.95%

19.08%

41.98%

3.05%

5.34%

4.58%