Research Article
[Retracted] Merging RFID and Blockchain Technologies to Accelerate Big Data Medical Research Based on Physiological Signals
Algorithm 1
The suggested mutual authentication protocol in the emergency mode.
| | The proposed protocol in the emergency mode (Figure 7) is as follows: | | (1) | Step 1 | | (2) | The reader initially generates the random numbers (NR, IDR, flag = 1); | | (3) | Calculate A = NR ⊕ IDR; | | (4) | Broadcast M1; | | (5) | Step 2 | | (6) | Compare IDR; | | (7) | if IDR A ⊕ NR then | | (8) | Process termination; | | (9) | else | | (10) | { | | (11) | set up V=RandPermute (); | | (12) | Send M2 to reader | | (13) | M2 in V; | | (14) | Step 3 | | (15) | for each do | | (16) | if then | | (17) | The reader and the tag match each other; | | (18) | Calculate Kbio = H (Q || NR); | | (19) | Send the message M3 = (I); | | (20) | Step 4 | | (21) | If the number of matched characteristics is greater than the predetermined threshold in WISP | | (22) | Calculate = H (Q||NR); | | (23) | if = Kbio then | | (24) | if = ; | | (25) | Verify success, generate random number, Calculate B = ⊕ ; | | (26) | Calculate K = H ( | ), and new key K’ = H (K |); | | (27) | Send S1 = M4 = | | (28) | Step 5 | | (29) | if Kbio (reader) = Kbio (tag), obtain (, ); | | (30) | Calculate S2 = ; | | (31) | if S2 = S1 then | | (32) | Calculate (K, K′) K = H (), K’ = H (K |); | | (33) | Send to WISP | | (34) | Step 6 | | (35) | WISP verifies the session keys’ equality calculated by both sides (WISP, reader) | | (36) | If the session keys calculated on both sides are equal | | (37) | WISP records (K′, Seq1) to awaken the IMD antenna | | (38) | When IMD detects the request, begins to collect (K′, Seq1), and employs them to exchange data securely with the programmer | | (39) | }; |
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