Table 3.

Qualitative comparison of the proposed method and the centralized method

Indicator	Proposed method	Centralized method
Distributability	Distributable	Not distributable
Security	100%	Small and central system dependent
Energy consumption	High energy consumption	Low energy consumption
Impact against attacks	Theoretically impossible	vulnerable
Effective against DDoS attacks	Theoretically impossible	Extremely vulnerable
Scalability	Very much	Medium
Integrity	Very much	Low
Memory consumption	As the number of blocks increases	Medium
Authentication time	As the number of blocks increases	Medium
Reliability	100%	Medium