Enterprise Data Sharing with Privacy-Preserved Based on Hyperledger Fabric Blockchain in IIOT’s Application

. 2022 Feb 2;22(3):1146. doi: 10.3390/s22031146

Algorithm 4: Data Transferring.

Input:

M_{A - B}

;

Step 1: request;

A chooses a random number

k_{A 2}

;

M_{A - B} = (I D_{A} ∥ T_{A - B} ∥ I D_{B} ∥ H a s h_D a t a ∥ T x n u m b e r);

call function

S i g n (M_{A - B}, d_{A}, k_{A 2})

, return

(r_{A 2}, s_{A 2})

;

C_{A - B} \leftarrow E_{P u k_{B}} (M_{A - B})

send

C_{A - B}, (r_{A 2}, s_{A 2})

to HFB;

Step 2: return;

Upon receiving;

M_{A - B} = D_{P r k_{B}} (C_{A - B});

check whether

T_{N O W} - T_{A - B} \leq τ

;

call function

V e r i f y (z_{A 2}^{'}, r_{A 2, s_{A 2})}

, return result;

T_{N O W} - T_{A - B} \leq τ

then

if result = “valid” then

B chooses a random number

k_{B 3}

;

M_{B - A} = (I D_{B} ∥ T_{B - A} ∥ I D_{A} ∥ S K_{B})

call function

S i g n (M_{B - A}, d_{B}, k_{B 3})

, return

(r_{B 3}, s_{B 3})

;

C_{B 2} \leftarrow E_{P u k_{A}} (M_{B - A});

send

C_{B 2}, (r_{B 3}, s_{B 3})

, to A;

end

Step 3: Descrypt data;

M_{B - A} = D_{P r k_{A}} (C_{B - A})

; check whether

T_{N O W} - T_{B - A} \leq τ

;

call function

V e r i f y (z_{B 3}^{'}, r_{B 3}, s_{B 3})

, return result;

T_{N O W} - T_{B - A} \leq τ

then

if result = “valid” then

store

S K_{B}

; get encrypted data in IPFS;

M_{1} = D_{S K_{B}} (C_{B 1});

end