Nt1310 Unit 6 Powerpoint

Nt1310 Unit 6 Powerpoint

A. Setup: The setup phase takes input a security parameter . It selects a bilinear group of prime order p with b as generator, and bilinear map The universe attribute is . It selects for attribute n, , and a random exponent . The public key and master key is given by (1) (2)

Though is publicly known to all system parties, is kept secretly by trusted authority (TA).

B. Key Generation: The key generation phase takes set of attributes S as input and the secret key equivalent to S is produced as output. Initially, it selects a random number from . Then, it calculates the key as (3)

C. Encryption: The

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