Blockchain-Based Privacy Protection Scheme for IoT-Assisted Educational Big Data Management

Table 2

RFID record.

Record hash	Action	RFID	Name	Role	Time	Location	GPS
1c8f6e...	Check-in	E1 0D 2D 21	Teacher1	Teacher	08:05:17	Location 1	36.363, 120.689
fe0879...	Check-in	D1 D7 51 02	Teacher2	Teacher	08:05:26	Location 1	36.363, 120.689
5c2bf8...	Check-in	06 7F FB AD	Student1	Student	08:25:38	Location 2	36.363, 120.690
d283f1...	Check-in	82 3F B1 58	Student3	Student	08:25:43	Location 2	36.363, 120.690
736393...	Check-in	6D B6 6B 4A	Student2	Student	08:25:49	Location 2	36.363, 120.690
937516...	Check-out	6D B6 6B 4A	Student2	Student	17:01:23	Location 2	36.363, 120.690
d67513...	Check-out	06 7F FB AD	Student1	Student	17:01:48	Location 2	36.363, 120.690
affebb...	Check-out	82 3F B1 58	Student3	Student	17:01:59	Location 2	36.363, 120.690
ee9bfd...	Check-out	E1 0D 2D 21	Teacher1	Teacher	18:00:16	Location 1	36.363, 120.689
c0d131...	Check-out	D1 D7 51 02	Teacher2	Teacher	18:00:29	Location 1	36.363, 120.689