Using Guesswork as a Measure for Confidentiality of Selectively Encrypted Messages

Lundin, Reine; Lindskog, Stefan; Brunström, Anna; Fischer‐Hübner, Simone

doi:10.1007/978-0-387-36584-8_14

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…We believe that the choice of measure is dependent on the considered attack model, since the amount of information an attacker has will affect the number of guesses. Furthermore, we hope to derive a formula for the rate of the guesswork, that is connected to the rate of the entropy, and hence continue to examine the confidentiality levels for selectively encrypted messages [11].…”

Section: Discussionmentioning

confidence: 99%

On the Relationship between Confidentiality Measures: Entropy and Guesswork

Lundin¹,

Holleboom²,

Lindskog³

2007

Proceedings of the 5th International Workshop on Security in Information Systems

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In this paper, we investigate in detail the relationship between entropy and guesswork. The aim of the study is to lay the ground for future efficiency comparison of guessing strategies. After a short discussion of the two measures, and the differences between them, the formal definitions are given. Then, a redefinition of guesswork is made, since the measure is not completely accurate. The change is a minor modification in the last term of the sum expressing guesswork. Finally, two theorems are stated. The first states that the redefined guesswork is equal to the concept of cross entropy, and the second states, as a consequence of the first theorem, that the redefined guesswork is equal to the sum of the entropy and the relative entropy.

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Section: Discussionmentioning

confidence: 99%

On the Relationship between Confidentiality Measures: Entropy and Guesswork

Lundin¹,

Holleboom²,

Lindskog³

2007

Proceedings of the 5th International Workshop on Security in Information Systems

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“…Very few works have been reported on the unpredictability of the encrypted part. In [11], guesswork is used as a measure to evaluate the confidentiality of selectively encrypted messages. It estimates the expected number of guesses an attacker should try before finding the right secret.…”

Section: Cryprographic Securitymentioning

confidence: 99%

Secure and Low Cost Selective Encryption for JPEG2000

Massoudi

Lefèbvre

Vleeschouwer

et al. 2008

2008 Tenth IEEE International Symposium on Multimedia

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“…We are currently working on an idea that is primarily based on guesswork [15]. Some initial results have been reported in [11].…”

Section: Future Workmentioning

confidence: 99%

Middleware Support for Tunable Encryption

2006

Proceedings of the 5th International Workshop on Wireless Information Systems

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To achieve an appropriate tradeoff between security and performance for wireless applications, a tunable and differential treatment of security is required. In this paper, we present a tunable encryption service designed as a middleware that is based on a selective encryption paradigm. The core component of the middleware provides block-based selective encryption. Although the selection of which data to encrypt is made by the sending application and is typically content-dependent, the representation used by the core component is application and content-independent. This frees the selective decryption module at the receiver from the need for application or content-specific knowledge. The sending application specifies the data to encrypt either directly or through a set of highlevel application interfaces. A prototype implementation of the middleware is described along with an initial performance evaluation. The experimental results demonstrate that the generic middleware service offers a high degree of security adaptiveness at a low cost.

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Using Guesswork as a Measure for Confidentiality of Selectively Encrypted Messages

Cited by 8 publications

References 7 publications

On the Relationship between Confidentiality Measures: Entropy and Guesswork

On the Relationship between Confidentiality Measures: Entropy and Guesswork

Secure and Low Cost Selective Encryption for JPEG2000

Middleware Support for Tunable Encryption

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