A Random Label and Lightweight Hash-Based Security Authentication Mechanism for a UAV Swarm

Algorithm 1

The encryption algorithm of RC4.

1: Generate key stream seed 1:

2: Given a state vector S, initialize it, and assign 0, 1, 2, ..., 254, 255 to each byte in ascending order;

3: fordo

4: ;

5: end for

6: Enter the initial key:

7: The initial key is defined as any combination of less than 256 bytes;

8: Fill in circularly until 256 bytes are filled;

9: The final result is defined as a vector T, which is used to generate seed 2;

10: Disrupt the initial seed 1:

11: Perform a replacement operation on the state vector S, starting from the 0th byte, and executing 256 times to ensure that each byte is processed;

12: ;

13: fordo

14: ;

15: ;

16: end for

17: Generate key stream and encrypt:

18: ;

19: while clabel.length– do

20: ;

21: ;

22: ;

23: ;

24: ;

25: ;

26: end while