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Overview: Most of the existing Internet applications are built on the assumption of immediate end-to-end connectivity. However, there are many scenarios, like messaging in sparsely populated areas, in which immediate connectivity is not available. Recently, the use of identity-based cryptography has been proposed as one way to help solve some of the security issues in Disruption-Tolerant Networks (DTNs). This paper discusses the security issues of DTNs, survey proposed solutions, and identify some improvements.
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