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Electronic Colloquium on Computational Complexity

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REPORTS > KEYWORD > SMALL-DEPTH CIRCUITS:
Reports tagged with Small-depth circuits:
TR12-137 | 1st November 2012
Johan Hastad

On the correlation of parity and small-depth circuits

Revisions: 1

We prove that the correlation of a depth-$d$
unbounded fanin circuit of size $S$ with parity
of $n$ variables is at most $2^{-\Omega(n/(\log S)^{d-1})}$.

more >>>

TR12-157 | 12th November 2012
Andrej Bogdanov, Chin Ho Lee

On the depth complexity of homomorphic encryption schemes

Revisions: 2

We show that secure homomorphic evaluation of any non-trivial functionality of sufficiently many inputs with respect to any CPA secure encryption scheme cannot be implemented by constant depth, polynomial size circuits, i.e. in the class AC0. In contrast, we observe that certain previously studied encryption schemes (with quasipolynomial security) can ... more >>>


TR16-041 | 17th March 2016
Johan Hastad

An average-case depth hierarchy theorem for higher depth

We extend the recent hierarchy results of Rossman, Servedio and
Tan \cite{rst15} to any $d \leq \frac {c \log n}{\log {\log n}}$
for an explicit constant $c$.

To be more precise, we prove that for any such $d$ there is a function
$F_d$ that is computable by a read-once formula ... more >>>




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