Table 21 Blockchain parameter settings for VANET-DDoSNet++ deployment.

From: A hybrid deep learning model for detection and mitigation of DDoS attacks in VANETs

Parameter

Value / Setting

Description / Purpose

Consensus protocol

Delegated Proof of Stake (DPoS)

Chosen for fast validation and energy efficiency

Block size

1 MB

Balances throughput and propagation delay

Block interval

2 s

Time between blocks to reduce latency

Transaction size

 ~ 250 bytes

Typical size of a VANET transaction

Network bandwidth

100 Mbps

Assumed VANET communication capacity

Number of delegates

21

Number of elected nodes validating blocks

Transaction throughput

 ~ 2000 transactions/sec

Supports high volume from vehicular communication

Transaction confirmation time

 ≤ 4 s

Ensures quick consensus and confirmation

Energy consumption per node

 ~ 50 Joules per block

Optimized for vehicular edge devices

Fault tolerance

Up to 33% malicious nodes

Security threshold of the consensus

Cryptographic algorithms

ECDSA (Elliptic Curve Digital Signature Algorithm)

For authentication and integrity

Smart contract support

Enabled

For automated trust management and alert broadcasting

Block propagation protocol

Gossip Protocol

Efficient message dissemination in VANET

Data storage model

Lightweight ledger pruning

Minimizes storage on edge devices