International Scholarly Research Notices / 2012 / Article / Tab 1

Research Article

Key Management Schemes for Multilayer and Multiple Simultaneous Secure Group Communication

Table 1

Comparison of storage and encryption cost.

Dexter et al. schemeOur scheme

Storage at KDC ( 𝑑 βˆ’ 1 ) ( 2 𝑁 βˆ’ 1 ) 2 𝑁 + 𝑑 βˆ’ 2
Storage at each user of layer 𝑖 ( 𝑑 βˆ’ 1 ) ( ⌈ l o g 2 𝑆 𝑖 βŒ‰ + 𝑖 ) 𝑑 + ⌈ l o g 2 𝑆 𝑖 βŒ‰ + 𝑖 βˆ’ 1
Number of elements encrypted during leave from layer 𝑖 ( 𝑑 βˆ’ 1 ) ( ⌈ l o g 2 𝑆 𝑖 βŒ‰ + 𝑖 ) ⌈ l o g 2 𝑆 𝑖 βŒ‰ + 𝑖 𝑑