An introduction to security challenges in user-facing cryptographic software

Paul, Greig and Irvine, James; Samant, Khajuria and Sørensen, Lene and Skouby, Knud Erik, eds. (2017) An introduction to security challenges in user-facing cryptographic software. In: Cybersecurity and Privacy - Bridging the Gap. River Publishers, Aalborg, pp. 15-39. ISBN 9788793519664

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Abstract

One of the key challenges in the development of secure software is the tradeoff between usability and security. Often, many of the rigorous requirements of a strong cryptographic implementation appear to be at odds with consumer requirements and desires. Non-technical users typically desire a straightforward user interface which does not require them to learn any special skills to use the application, yet also expect the application to offer them adequate protection [30]. There is, however, very little that an average user can do to ensure the security of the underlying technical implementation of security software they run, presenting a major challenge for users left unable to conveniently verify that the software works as expected. The intersection of the technical requirements for cryptography, and consumers’ desires for usability, introduces a number of opportunities for security weaknesses to emerge within the design of security software. A desire for convenience has been widely recognised as resulting in poor security practices, such as in the selection of passwords [31], of particular concern where user passwords are used for the generation of encryption keys for data.

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