what is the difference between IBE and ABE schemes
With IBE the public key is a public bitstring as your email. A Key-authority issues a secret key that is tied with this public key.The owner of the secret key can only decrypt.

ABE entails more complex access control on decryption operation such as:"Only the owner of the secret key that corresponds to: Area:=Italy AND Age:&lt;30 and Business:=Researcher" can decrypt. The last predicates are called the attributes