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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Homomorphic Signatures and Message Authentication Codes
verfasst von : Dario Catalano
Erschienen in: Security and Cryptography for Networks
Verlag: Springer International Publishing
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Homomorphic message authenticators allow to validate computation on previously signed data. The holder of a dataset {
m
1
, …,
m
ℓ
} uses her secret key
sk
to produce corresponding tags (
σ
1
, …,
σ
ℓ
) and stores the authenticated dataset on a remote server. Later the server can (publicly) compute
m
=
f
(
m
1
, …,
m
ℓ
) together with a succinct tag
σ
certifying that
m
is the correct output of the computation
f
. A nice feature of homomorphic authenticators is that the validity of this tag can be verified
without
having to know the original dataset. This latter property makes the primitive attractive in a variety of context and applications, including, for instance, verifiable delegation of computation on outsourced data.
In this short survey, I will give an overview of the state of the art in the areas of homomorphic signatures and message authentication codes. I will (briefly) describe some of the most recent results and provide an overview of the main challenges that remain to address.