Table 2 Scheme analysis and comparison Scheme Method Infrastructure Keys Computational complexity Ours Hash chain / 1 n*HMAC, n*MAC,1*AES BAE-Sym Session key / N n*HMAC, n*MAC,n*AES BAE-Asym Digital signature PKI 2 N + 2 n*PKI.
Nowadays, the increasing request in terms of road transport makes maintenance and rehabilitation of road infrastructures key tasks for road engineering.
The chapter describes the services provided by TSIs; the role of trust that depicts the relationship between the users of the services and the service providers; and roles of trusted security infrastructure, which includes authentication infrastructures, authorization infrastructures, key management infrastructures and security management infrastructure, and the concept of federation.
The rapid expansion outpaced city planning; overcrowding and insufficient infrastructure remain key development problems.
"New renewable energy infrastructure is key to keeping the lights on, tackling excessive energy bills and greening our economy.
The shift to using cloud computing and the delivery of the new infrastructure are key objectives for the financial year 2012-13.
When an impoverished Singapore became independent 51 years ago, its prime minister, Lee Kuan Yew, took the decision that investing in infrastructure was key to economic growth.
The promotion of green infrastructure is key to the long-term provision of water for the capital city, says Fernando Momiy, president of Sunass.
It would also act as a forcing function to strengthen data infrastructure around key challenges, and raise awareness and capacity for those working to solve them.
John Milgram, a spokesman for the attorney general's office, called aging infrastructure "a key factor" in the office's opposition to relicensing Indian Point.
