Notation

Meaning

PT_i

Patient i

D_l

Physician l i.e. doctor or nurse

s

Master secret key for TA

P_pub

System public key

d_x

Private key for entity x

Q_x

Public key for entity x

id_x

Identity for entity x

PIDPT_i

Set of pseudo-IDs for PT_i

pid_j

j^th pseudo-ID for PT_i

PUBPT_i

Set of public keys for PT_i

PRIPT_i

Set of private keys for PT_i

SKi-l

Session key shared between PT_i and D_l

H₁ (∙)

Hash function;

H₂ (∙)

Hash function;

T_x

Time stamp generated by entity x

ê

Bilinear map;

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Concatenation