Can somebody explain in simple words. real life example light help and limitations of these schemes etc.

  • $\begingroup$ This sounds like a homework question. Is it? $\endgroup$
    – pg1989
    Sep 24 '14 at 18:20

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:<30 and Business:=Researcher" can decrypt. The last predicates are called the attributes

  • $\begingroup$ key $\mapsto$ keys $\:$ and $\:$ corresponds $\mapsto$ correspond $\:$ and $\:$ decrypts $\mapsto$ decrypt $\;\;\;\;$ $\endgroup$
    – user991
    Sep 25 '14 at 2:06
  • 1
    $\begingroup$ ABE can be seen as a generalization of IBE: IBE is an ABE with a single attribute namely the ID. In ABE a user is only able to decrypt, if he matches all the specified attribute values. $\endgroup$
    – tylo
    Sep 25 '14 at 13:53
  • $\begingroup$ Can I tell that IBE works only with single public identifier and ABE supports multiple attributes with relationships (monotonous/non-monotonous) among them? is is right? $\endgroup$ Sep 26 '14 at 4:36
  • $\begingroup$ IBE is the singleton of ABE. $\endgroup$
    – Tan
    Jan 7 '20 at 11:54

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