On the adaptive security of macs and prfs
WebOn the Adaptive Security of MACs and PRFs. In Shiho Moriai , Huaxiong Wang , editors, Advances in Cryptology - ASIACRYPT 2024 - 26th International Conference on the Theory and Application of Cryptology and Information Security, Daejeon, South Korea, December 7-11, 2024, Proceedings, Part I . WebMAC) for streaming-accessed chunks and fine-grain MAC (i.e., per block MAC) for random-accessed ones, to reduce the MAC access bandwidth. To support dual-granularity MACs, we reserve space for both MACs and access only one of them at runtime based on the access pattern. Our hardware scheme to detect streaming accessed chunks is shown in …
On the adaptive security of macs and prfs
Did you know?
WebMulti-user Security and Adaptive Corruptions MACs and PRFs are also some of the most commonly used cryptographic primitives in practice; as such, they are often deployed in contexts A preliminary version of this paper will appear in the proceedings of ASIACRYPT 2024; this is the full version. WebWe consider the security of two of the most commonly used cryptographic primitives--message authentication codes (MACs) and pseudorandom functions (PRFs)--in a …
WebConstrained pseudorandom functions have recently been introduced independently by Boneh and Waters (Asiacrypt’13), Kiayias et al. (CCS’13), and Boyle et al. (PKC’14). In a standard pseudorandom function (PRF) a key k is used to evaluate the PRF on all inputs in the domain. Constrained PRFs additionally offer the functionality to delegate ... WebIn this work we study the question of security amplification of MACs, SIGs and PRFs, showing how to convert a corresponding weak primitive into a strong primitive. In brief, we prove a direct product theorem for MACs/SIGs (and even a Chernoff-type theorem to handle MACs/SIGs with imperfect completeness), and a (regular) XOR lemma for PRFs.
Web14 de ago. de 2005 · This paper studies the concrete security of PRFs and MACs obtained by keying hash functions based on the sponge paradigm. One such hash function is KECCAK, selected as NIST’s new SHA-3 standard. Web17 de abr. de 2024 · I'm a bit confused about the relationship between CCA/CPA-security and PRFs and particularly when do we think of encryption and decryption as a PRF. Assume we have an encryption scheme $\Pi = (Enc, Dec, Gen)$ to be a CPA-secure.
WebWe consider the security of two of the most commonly used cryptographic primitives—message authentication codes (MACs) and pseudorandom functions (PRFs)—in a multi-user setting with adaptive corruption. Whereas is it well known that any secure MAC …
Web1 de jan. de 2024 · Abstract. A compression-function-based MAC function called FMAC was presented as well as a vector-input PRF called vFMAC in 2016. They were proven to be secure PRFs on the assumption that their ... simon kernick fantastic fictionWebI am a cryptography research engineer specialised in the practical aspects of secure multi-party computation, cryptographic blockchain protocols, and threshold signatures. Furthermore I have worked with secure architecture design, authentication and general security for systems in production for both startups, and all the way to large entities. … simon keogh transportsimon kernick books in order tina boydWebIn this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. simon kenton high school staff directoryWebThis constrained PRF has already found many interesting applications. Unfortunately, the existing security proofs only show selective security (by a reduction to the security of the underlying PRG). To achieve full security, one has to use complexity leveraging, which loses an exponential factor 2 N in security, where N is the input length. simon kernick new book 2022WebECBC-MAC is commonly used as an AES-based MAC • CCM encryption mode (used in 802.11i) • NIST standard called CMAC NMAC not usually used with AES or 3DES • Main reason: need to change AES key on every block requires re-computing AES key expansion • But NMAC is the basis for a popular MAC called HMAC (next) simon keppie grant thorntonWebOn the Adaptive Security of MACs and PRFs. We consider the security of two of the most commonly used cryptographic primitives—message authentication codes … simon kernick books 2022