0
$\begingroup$

Is there any good paper or research carried out till now that a data is encrypted by a single key or onwer(user) and their are 2 or more decryption keys. One key can decrypt the entire data. Other keys decrypt partial data or a portion of data. A person having no key cannot decrypt the data but those having keys can fully or partially decrypt data based on the keys.

Improve this question
$\endgroup$
2
  • 1
    $\begingroup$ Are you sure you actually need a special algorithm for this? You could just encrypt different parts with different keys and give persons subsets of those. $\endgroup$
    – otus
    May 3, 2016 at 12:57
  • $\begingroup$ It depends what you mean by a "portion" of data. Many works have addressed issues which seem related to this question. The closest I can think of is the BCP cryptosystem. Each player can generate his own pair private/public key; the secret key of a player allows him to decrypt ciphertexts encrypted with his public key. Additionally, a master secret key can decrypt all the ciphertexts, whatever the public key used. (Other related and more powerful primitives are identity based and attribute based encryption). $\endgroup$
    – Geoffroy Couteau
    May 3, 2016 at 15:24

1 Answer 1

Reset to default
1
$\begingroup$

Functional encryption might fit your description; as far as I know it's still far from practical though.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.