[Resource Topic] 2021/105: A New Efficient Identity-Based Encryption Without Pairing

Welcome to the resource topic for 2021/105

Title:
A New Efficient Identity-Based Encryption Without Pairing

Authors: Majid Salimi

Abstract:

So far, most of the Identity-Based Encryption (IBE) schemes have been realized by employing bilinear pairings, lattices, trapdoor discrete logarithm, or based on the quadratic residue problem. Among the IBE schemes, only pairing-based methods seem to be practical. Previously published non-pairing-based schemes are generally inefficient in encryption, decryption, key generation, ciphertext size or key size. In this paper, we propose an IBE scheme based on a hybrid of Diffie-Hellman and RSA-like hardness assumption. The computational cost of the proposed scheme is lower than the previous schemes and the ciphertext size for an l-bit plaintext is only 2l bits. The proposed scheme is similar to the well-known ElGamal encryption algorithm; therefore it might be used in applications such as oblivious computation.

ePrint: https://eprint.iacr.org/2021/105

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