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The security of encryption against unauthorized decryption, unauthorized changing of the data, etc. Security should depend completely on the key. One distinguishes between the following two types of security:
Computational security: Quantitative security is a quantitative security against unauthorized decryption, based on particular (usually mathematical) assumptions like the inherent difficulty of factoring sufficiently long numbers. Often a security parameter denotes the computational level of the security.
Unconditional security: Security against unauthorized decryption assuming that the cryptanalyst has unlimited computing facilities (so, security in an information theoretic sense).
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Menezes AJ, van Oorschot PC, Vanstone SA (1997) Handbook of applied cryptography. CRC Press, Boca Raton
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© 2011 Springer Science+Business Media, LLC
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Bauer, F.L. (2011). Security. In: van Tilborg, H.C.A., Jajodia, S. (eds) Encyclopedia of Cryptography and Security. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-5906-5_175
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DOI: https://doi.org/10.1007/978-1-4419-5906-5_175
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-5905-8
Online ISBN: 978-1-4419-5906-5
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