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Table 1 Definition of symbols

From: ToAM: a task-oriented authentication model for UAVs based on blockchain

Symbols

Definition

GrpID

The group ID of a UAV group

\({\text{ID}}_{x}\)

The dynamic identity of UAV x

Ticket

Task tickets issued by mUAV for other UAVs

\({\text{P}}_{{\text{a}}}\), \({\text{P}}_{b}\)

UAV a\b's public key

\({\text{S}}_{{\text{a}}}\), \({\text{S}}_{b}\)

UAV a\b's private key

SK

Pre-shared key in a group

EK(·)

Encryption using a key K

H(·)

Hash function

Sign(·)

Signature

TS

Time stamp

E(·)

Using secret channel to communicate with smart contract