Secure Data Encryption for Cloud-Based Human Care Services

Algorithm 1

Adaptive encryption based on Simeck.

Require: Plaintext Blocks Round keys RK, The Number of Plaintext Blocks blkNum, Encryption Type t

Ensure: Ciphertext Blocks

1: if t == 1 then

2:     let n1 =blkNum/64; and r1 =blkNum %64;

3:     let n2 =r1/48; and r2 =r1%48;

4:     let n3 =r2/32; and r3 =r2%32;

5:     let n4 =r3/16; and r4 =r3%16;

6:     if r4 ≥1 then

7:      n4 ++;

8:      Pad ();

9:     fori from 1 to n1do

10:      Simeck 32/64 Enc SIMD 64Blks

11:     fori from 1 to n2do

12:      Simeck 32/64 Enc SIMD 48Blks

13:     fori from 1 to n3do

14:      Simeck 32/64 Enc SIMD 32Blks

15:     fori from 1 to n4do

16:      Simeck 32/64 Enc SIMD 16Blks

17: else

18:     let n1 =blkNum/32; and r1 =blkNum %32;

19:     let n2 =r1/24; and r2 =r1%24;

20:     let n3 =r2/16; and r3 =r2%16;

21:     let n4 =r3/8; and r4 =r3%8;

22:     if r4 ≥1 then

23:      n4 ++;

24:      Pad ();

25:     for i from 1 to n1do

26:      Simeck 64/128 Enc SIMD 32Blks

27:     fori from 1 to n2do

28:      Simeck 64/128 Enc SIMD 24Blks

29:     fori from 1 to n3do

30:      Simeck 64/128 Enc SIMD 16Blks

31:     fori from 1 to n4do

32:      Simeck 64/128 Enc SIMD 8Blks

33     Return C