What is attribute based encryption algorithm?
Attribute-based encryption is a type of public-key encryption in which the secret key of a user and the ciphertext are dependent upon attributes (e.g. the country in which they live, or the kind of subscription they have).
What is key policy attribute based encryption?
Key-policy attribute-based encryption (KP-ABE) is an important type of ABE, which enables senders to encrypt messages under a set of attributes and private keys are associated with access structures that specify which ciphertexts the key holder will be allowed to decrypt.
Which algorithm is used protect private keys?
The Diffie-Hellman algorithm will be used to establish a secure communication channel. This channel is used by the systems to exchange a private key. This private key is then used to do symmetric encryption between the two systems.
What are the examples of encryption algorithm?
Some examples of symmetric encryption algorithms include:
- AES (Advanced Encryption Standard)
- DES (Data Encryption Standard)
- IDEA (International Data Encryption Algorithm)
- Blowfish (Drop-in replacement for DES or IDEA)
- RC4 (Rivest Cipher 4)
- RC5 (Rivest Cipher 5)
- RC6 (Rivest Cipher 6)
How does CP-Abe work?
CP-ABE (Ciphertext-Policy Attribute-Based Encryption) with hidden access control policy enables data owners to share their encrypted data using cloud storage with authorized users while keeping the access control policies blinded. This scheme incorporates extensible, partially hidden constraint policy.
Why CP-Abe is better than KP Abe?
CP- ABE is conceptually closer to traditional access control models such as Role-Based Access Control (RBAC) [8] as users’ decryption keys are associated with a set of attributes. Hence CP-ABE is more natural to apply instead of KP-ABE, to enforce access control of encrypted data.
How does proxy re encryption work?
Proxy re-encryption (PRE) schemes are cryptosystems which allow third parties (proxies) to alter a ciphertext which has been encrypted for one party, so that it may be decrypted by another.
Is AES better than RSA?
RSA is neither better nor worse than AES, as the two are designed for completely different use cases. RSA is an asymmetric algorithm designed for public-key cryptography. AES is a symmetric algorithm designed for private-key cryptography. It’s faster than RSA but only works when both parties share a private key.
Which is the best algorithm for encryption?
Best Encryption Algorithms
- AES. The Advanced Encryption Standard (AES) is the trusted standard algorithm used by the United States government, as well as other organizations.
- Triple DES.
- RSA.
- Blowfish.
- Twofish.
- Rivest-Shamir-Adleman (RSA).
What is cipher text policy?
Previous attribute-based encryption systems used attributes to describe the encrypted data and built policies into user’s keys; while in our system attributes are used to describe a user’s credentials, and a party encrypting data determines a policy for who can decrypt. …