An Enhanced Lightweight Dynamic Pseudonym Identity Based Authentication and Key Agreement Scheme Using Wireless Sensor Networks for Agriculture Monitoring

. 2019 Mar 6;19(5):1146. doi: 10.3390/s19051146

Step 1:

The

U_{i}

inserts his/her own smartcard into card reader and inputs

I D_{i}

P W_{i}

and also imprints

F_{i}

on a sensor device. Now, the card reader computes

R e p (F_{i}

P_{F})

X_{F}^{*}

R P W_{i}^{*}

h (P W_{i} ‖ X_{F}^{*})

A_{i}^{*}

B_{i}

⊕

h (R P W_{i}^{*} ‖ I D_{i})

D_{i}^{*}

h (A_{i}^{*} ‖ R P W_{i}^{*} ‖ I D_{i})

{[h (B_{i} ‖ X)]}^{*}

C_{i}

⊕

A_{i}^{*}

and verifies if

D_{i}^{*}

equals

D_{i}

. If this verification holds then the system continues the process. Otherwise, the session is terminated.

Step 2:

Now,

U_{i}

generates a random nonce

R_{U}

and enumerates

D I D_{i} = I D_{i} \oplus h (B_{i} ‖ X)

M_{1} = E_{A i} (R_{U} ‖ I D_{S N_{j}} ‖ I D_{G W N_{j}} ‖ T_{1})

M_{2} = h (R_{U} ‖ I D_{i} ‖ T_{1} ‖ h (B_{i} ‖ X))

and sends

{B_{i}, D I D_{i}, M_{1}, M_{2}}

B S

via public channel.