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This paper revisits the multi-user (mu) security of symmetric encryption, from the perspective of delivering an analysis of the AES-GCM-SIV AEAD scheme. Our end result shows that its mu security is co...
Block cipher modes of operation provide a way to securely encrypt using a block cipher. The main factors in analyzing modes of operation are the level of security achieved (chosen-plaintext security, ...
We revisit the Even-Mansour (EM) scheme with random oracle key derivation previously considered by Andreeva et al. (CRYPTO 2013). For this scheme, Andreeva et al. provided an indifferentiability (from...
Security of a cryptographic application is typically defined by a security game. The adversary, within certain resources, cannot win with probability much better than 0 (for unpredictability applicati...
We present Lyra, a password-based key derivation scheme based on cryptographic sponges. Lyra was designed to be strictly sequential (i.e., not easily parallelizable), providing strong security even ...
M3lcrypt (canonical M3lcryptH) is a password based key derivation function built around the Merkle-Damgard hash function H. It supports large [pseudo]random salt values ( 128-bit) and password length...
Feistel constructions have been shown to be indifferentiable from random permutations at STOC 2011. Whereas how to properly mix the keys into an un-keyed Feistel construction without appealing to doma...
Related-Key Attacks (RKAs) allow an adversary to observe the outcomes of a cryptographic primitive under not only its original secret key e.g., s, but also a sequence of modified keys φ(s), where φ ...
Qin, Liu, Yuen, Deng, and Chen (PKC 2015) gave a new security notion of key-derivation function (KDF), continuous non-malleability with respect to Φ-related-key attacks (Φ-CNM), and its application t...
We revisit the classical problem of converting an imperfect source of randomness into a usable cryptographic key. Assume that we have some cryptographic application $P$ that expects a uniformly random...
Non-malleable codes, defined by Dziembowski, Pietrzak and Wichs (ICS '10), provide roughly the following guarantee: if a codeword $c$ encoding some message $x$ is tampered to $c' = f(c)$ such that $c'...
Many real-world protocols, such as SSL/TLS, SSH, IPsec, IEEE 802.11i, DNSSEC, and Kerberos, derive new keys from other keys. To be able to analyze such protocols in a composable way, in this paper we ...
In spite of the central role of key derivation functions (KDF) in applied cryptography, there has been little formal work addressing the design and analysis of general multi-purpose KDFs. In practice,...
Key derivation refers to the process by which an agreed upon large random number, often named master secret, is used to derive keys to encrypt and authenticate data. Practitioners and standardization ...

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