Identity based encryption in ddh hard groups
Web6 aug. 2024 · AfricaCrypt is a major scientific event that seeks to advance and promote the field of cryptology on the African continent. The conference has systematically drawn … WebThe question whether Identity-Based Encryption (IBE) can be based on the Decisional Diffie-Hellman (DDH) assumption is one of the most prominent questions in …
Identity based encryption in ddh hard groups
Did you know?
WebThe decision-Diffie-Hellman problem (DDH) is a central computational problem in cryptography. It is known that the Weil and Tate pairings can be used to solve many DDH problems on elliptic curves. Distortion maps are an important tool for solving DDH problems using pairings and it is known that distortion maps exist for all supersingular elliptic curves. Web23 jan. 2024 · (Key-policy) attribute-based encryption (KP-ABE) is a powerful and useful generalization of identity-based encryption (IBE). In a KP-ABE system, ciphertexts are …
Web10 apr. 2024 · In this paper, we focus on identity-based group encryption. We have revisited “Identity-Based Group Encryption (IBGE)” proposed by Xiling et al. Their scheme claims to achieve anonymity of the receiver. We have shown that the zero-knowledge proof they have used leaks much more information, due to which the verifier who is honest but … Web25 sep. 2008 · Identity-Based Encryption in DDH Hard Groups. Book. Oct 2024; Saqib A. Kakvi; Olivier Blazy; View... From here, the message m is sent a non-lattice point utilizing a random value salt and hash ...
WebIdentity-Based Encryption in DDH Hard Groups. In Lejla Batina , Joan Daemen , editors, Progress in Cryptology - AFRICACRYPT 2024: 13th International Conference on Cryptology in Africa, AFRICACRYPT 2024, Fes, Morocco, July 18-20, 2024, Proceedings . Web1 jun. 2013 · Identity-Based Encryption in DDH Hard Groups. Chapter. Oct 2024; Saqib A. Kakvi; Olivier Blazy; The concept of Identity-Based Encryption was first introduced by Shamir (CRYPTO 1984) but were not ...
Web6 okt. 2024 · Identity-Based Encryption (IBE) was first proposed by Shamir and is a generalisation of standard Public Key Encryption (PKE), wherein instead of each user generating a public key themselves, their unique identifier, such as their e-mail … The concept of Identity-Based Encryption was first introduced by Shamir …
Web30 jun. 2016 · We then construct a concrete identity-based group encryption scheme and prove its related security properties. IBGE involves five parties, a group manager (GM), a group of legitimate users, a sender, a verifier and a private key generator (PKG). IBGE consists of the six procedures. daymak rickshaw king mobility scooterWebOur exploration on the limitations of DDH begins with Identity-Based Encryption (IBE), which is a public-key system where a user can encrypt to any other recipient knowing … gawler show horsesWebddh has b een successfully used to simplify man cryptographic sc hemes. W e discuss some of these in Section 4. 1.1 ddh in v arious group families The ddh assumption is v ery attractiv e. Ho w ev er, one m ust k eep in mind that it a strong assumption (far stronger than cdh). W e note that in some groups the is b eliev ed to b e true, y et the ... gawler show ticketsWebLossy trapdoor functions (LTFs) were first introduced by Peikert and Waters (STOC’08). Since their introduction, lossy trapdoor functions have found numerous applications. They can be used as tools to construct important cryptographic primitives such as injective one-way trapdoor functions, chosen-ciphertext-secure public key encryptions, deterministic … gawler show timesWebThe decisional Diffie–Hellman (DDH) assumption is a computational hardness assumption about a certain problem involving discrete logarithms in cyclic groups. It is used as the … daymak roadstar deluxe mobility scooterWebgroups of imaginary quadratic elds and their use for DL based cryptography are given in Appendix B. 2 DDH Group with an Easy DL Subgroup In this section, we introduce and formalize the concept of a group in which the decisional Di e-Hellman problem is hard, whereas it contains a subgroup in which the discrete logarithm problem is easy. gawler showgroundsdaymak rickshaw mobility scooter