Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Lecture notes in computer science

Cryptography for Unconditionally Secure Message Transmission in Networks (Invited Talk)

Kaoru Kurosawa

Published Jan 1, 2010• 0 citations
Publisher
DOI
10.1007/978-3-642-17619-7_4

Related papers

Unconditionally secure message transmission in arbitrary directed synchronous networks tolerating generalized mixed adversary

Kannan Srinathan, Arpita Patra, Ashish Choudhary +1 more

In this paper, we re-visit the problem of unconditionally secure message transmission (USMT) from a sender S to a receiver R, who are part of a distributed synchronous network, modeled as an arbitrary directed graph. Some of the intermediate nodes between S and R can be under the control of an adversary having unbounded computing power. Desmedt and Wang [4] have given the characterization of USMT in directed networks. However, in their model, the underlying network is abstracted as directed node disjoint paths (also called as wires/channels) between S and R, where the intermediate nodes are oblivious, message passing nodes and perform no other computation. In this work, we first show that the characterization of USMT given by Desmedt et.al [4] does not hold good for arbitrary directed networks, where the intermediate nodes can perform some computation, beside acting as message forwarding nodes. We then give the characterization of USMT in arbitrary directed networks, considering the entire network as a whole. As far our knowledge is concerned, this is the first ever characterization of USMT in arbitrary directed networks.

ACM Asia Conference on Computer and Communications Security (ASIA CCS)•Mar 10, 2009•12 citations

Approaches to Efficient and Robust Cryptographic Protocols

Bartosz Przydatek

•Jan 1, 2007•0 citations

Unconditionally Reliable and Secure Message Transmission in Undirected Synchronous Networks: Possibility, Feasibility and Optimality.

Arpita Patra, Ashish Choudhury, Chandrasekharan Pandu Rangan +1 more

We study the interplay of network connectivity and the issues related to the possibility, feasibility and optimality for unconditionally reliable message transmission (URMT) and unconditionally secure message transmission (USMT) in an undirected synchronous network, under the influence of an adaptive mixed adversary A (tb,to,tf,tp), who has unbounded computing power and can corrupt up to tb, to, tf and tp nodes in the network in Byzantine, omission, fail-stop and passive fashion respectively. In URMT problem, a sender S and a receiver R are part of a distributed network, where S and R are connected by intermediate nodes, of which at most tb, to, tf and tp nodes can be under the control of A (tb,to,tf,tp). S wants to send a message m which is a sequence of ℓ (ℓ ≥ 1) field elements from a finite field F to R. The challenge is to design a protocol, such that after interacting in phases1 as per the protocol, R should be able to obtain m with probability at least 1 − δ, where 0 < δ < 1 2, irrespective of any adversarial strategy of A (tb,to,tf,tp). The USMT problem has an additional requirement that A (tb,to,tf,tp) should not know anything about m in information theoretic sense. In this paper, we answer the following in context of URMT and USMT: (a) Possibility: when

•Jan 1, 2008•5 citations

Recent Developments and Open Problems in Information Theoretic Cryptography

Shun Watanabe

IEICE Technical Report; IEICE Tech. Rep.•Nov 21, 2017•0 citations

Unconditionally reliable and secure message transmission in undirected synchronous networks: possibility, feasibility and optimality

Arpita Patra, Ashish Choudhury, Chandrasekharan Pandu Rangan +1 more

We study the interplay of network connectivity and the issues related to the 'possibility', 'feasibility' and 'optimality' for unconditionally reliable message transmission (URMT) and unconditionally secure message transmission (USMT) in an undirected synchronous network, under the influence of an adaptive mixed adversary having unbounded computing power, who can corrupt some of the nodes in the network in Byzantine, omission, fail-stop and passive fashion respectively. We consider two types of adversary, namely threshold and non-threshold. One of the important conclusions we arrive at from our study is that allowing a negligible error probability significantly helps in the 'possibility', 'feasibility' and 'optimality' of both reliable and secure message transmission protocols. To design our protocols, we propose several new techniques which are of independent interest.

International Journal of Applied Cryptography•Jan 1, 2010•38 citations

Towards Optimal and Efficient Perfectly Secure Message Transmission

Matthias Fitzi, Matthew Franklin, Juan A. Garay +1 more

Springer eBooks•May 16, 2007•80 citations
In this paper, we re-visit the problem of unconditionally secure message transmission (USMT) from a sender S to a receiver R, who are part of a distributed synchronous network, modeled as an arbitrary directed graph. Some of the intermediate nodes between S and R can be under the control of an adversary having unbounded computing power. Desmedt and Wang [4] have given the characterization of USMT in directed networks. However, in their model, the underlying network is abstracted as directed node disjoint paths (also called as wires/channels) between S and R, where the intermediate nodes are oblivious, message passing nodes and perform no other computation. In this work, we first show that the characterization of USMT given by Desmedt et.al [4] does not hold good for arbitrary directed networks, where the intermediate nodes can perform some computation, beside acting as message forwarding nodes. We then give the characterization of USMT in arbitrary directed networks, considering the entire network as a whole. As far our knowledge is concerned, this is the first ever characterization of USMT in arbitrary directed networks.
We study the interplay of network connectivity and the issues related to the possibility, feasibility and optimality for unconditionally reliable message transmission (URMT) and unconditionally secure message transmission (USMT) in an undirected synchronous network, under the influence of an adaptive mixed adversary A (tb,to,tf,tp), who has unbounded computing power and can corrupt up to tb, to, tf and tp nodes in the network in Byzantine, omission, fail-stop and passive fashion respectively. In URMT problem, a sender S and a receiver R are part of a distributed network, where S and R are connected by intermediate nodes, of which at most tb, to, tf and tp nodes can be under the control of A (tb,to,tf,tp). S wants to send a message m which is a sequence of ℓ (ℓ ≥ 1) field elements from a finite field F to R. The challenge is to design a protocol, such that after interacting in phases1 as per the protocol, R should be able to obtain m with probability at least 1 − δ, where 0 < δ < 1 2, irrespective of any adversarial strategy of A (tb,to,tf,tp). The USMT problem has an additional requirement that A (tb,to,tf,tp) should not know anything about m in information theoretic sense. In this paper, we answer the following in context of URMT and USMT: (a) Possibility: when
We study the interplay of network connectivity and the issues related to the 'possibility', 'feasibility' and 'optimality' for unconditionally reliable message transmission (URMT) and unconditionally secure message transmission (USMT) in an undirected synchronous network, under the influence of an adaptive mixed adversary having unbounded computing power, who can corrupt some of the nodes in the network in Byzantine, omission, fail-stop and passive fashion respectively. We consider two types of adversary, namely threshold and non-threshold. One of the important conclusions we arrive at from our study is that allowing a negligible error probability significantly helps in the 'possibility', 'feasibility' and 'optimality' of both reliable and secure message transmission protocols. To design our protocols, we propose several new techniques which are of independent interest.