Secure Proxy-Reencryption-Based Inter-Network Key Exchange

Lloyd Greenwald, Kurt Rohloff, David Stott

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


In this paper we present a novel approach to distribute session keys securely across administrative boundaries where participants may be unable to interact directly. The basis of our approach is the use of Proxy ReEncryption (PRE) to encrypt session keys (e.g., AES keys), publish the session keys to a proxy server, and then distribute the session keys to session participants who reencrypt, decrypt and access the session keys. Our approach, Secure Proxy-Reencryption-based Inter-network Key Exchange (SPIKE), applies to several realworld use cases, including coalition data sharing, sensor network data sharing and large-scale video distribution. SPIKE enables these use cases without requiring coordination between publishers and subscribers. We address an honest-but-curious adversary model where any data sent over a network link or stored at a proxy can be leaked. Our design of SPIKE is independent of the specific PRE scheme used. For implementation and experimentation purposes we implement and use, PALISADE, a general post-quantum lattice-based encryption library that provides a unidirectional PRE scheme with collusion resistance, supports multi-hop reencryption, and admits more general homomorphic encryption properties than other schemes. We present our design and implementation in experimental settings to evaluate realworld performance. We discuss generalization of our approach to increase scalability and address broader security concerns.

Original languageEnglish (US)
Title of host publication2018 IEEE Military Communications Conference, MILCOM 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781538671856
StatePublished - Jul 2 2018
Event2018 IEEE Military Communications Conference, MILCOM 2018 - Los Angeles, United States
Duration: Oct 29 2018Oct 31 2018

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM


Conference2018 IEEE Military Communications Conference, MILCOM 2018
Country/TerritoryUnited States
CityLos Angeles

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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