ID-Based Cryptography and Attribute-Based Cryptography
Malabika Das, Rajdeep Chakraborty, Chandan Banerjee · Advances in civil and industrial engineering book series · 2023
Identity and attribute-based cryptosystems have now become the most interesting research area in cryptography. Id-based and attribute-based cryptography both are improved variants of public-key cryptography. The identity-based cryptography is based on the identity of the user, such as email address, IP address, or mobile number. On the other hand, in attribute-based cryptography users encrypt and decrypt the message based on their attributes. Both IBE and ABE are based on mathematical concepts like Integer factorization, Quadratic Residues, Discrete logarithm Problems, Diffie-Hellman problems, and Bilinear pairings. IBE allows users to encrypt and decrypt messages using their identities whereas ABE provides fine-grain access control, it allows organizations and individuals to access data based on specific attributes or properties. IBE and ABE have various applications in cloud computing, digital signatures, and secure data sharing in IoT. Most ABE schemes based on access structure can be categorized as Key-Policy ABE (KP-ABE) and ciphertext-based ABE (CP-ABE).