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This work revisits the following question: in the ideal cipher model, can a cascade of several ideal (κ,n)(κ,n)-blockciphers realize 22κ22κ independent nn-bit random permutations, i.e. an ideal (2κ,n)...
Nonlinear feedback shift registers (NFSRs) are an important type of sequence generators used for building stream ciphers. The shift register used in Grain, one of eSTREAM finalists, is a cascade con...
This paper discusses provable security of two types of cascade encryptions. The first construction \CEl, called l-cascade encryption, is obtained by sequentially composing l blockcipher calls with ind...
We introduce and study the iterated random permutation problem, which asks how hard it is to distinguish, in a black-box way, the rth power of a random permutation from a uniformly random permutatio...
We construct an algebraic pseudorandom function (PRF) that is more efficient than the classic Naor- Reingold algebraic PRF. Our PRF is the result of adapting the cascade construction, which is the bas...
The security of cascade blockcipher encryption is an important and well-studied problem in theoretical cryptography with practical implications. It is well-known that double encryption improves the ...
We develop a couple of new methods to reduce transmission overheads in broadcast encryption. The methods are based on the idea of assigning one key per each partition using one-way key chains after ...

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