Survey of Authentication and Authorization for the Internet of Things

Table 2

Number of articles processed in the survey.

Indexer	Results	Prefiltered	Relevant
IEEE Xplore	120	29	15
ACM DL	84	9	7
WoS	67	31	13
SpringerLink	33	8	6
ScienceDirect	27	9	2
Total	331	86	43