Security in the Presence of Key Reuse: Context-Separable Interfaces and their Applications
ADVANCES IN CRYPTOLOGY - CRYPTO 2019, PT 1, pp. 738-768, 2019.
Key separation is often difficult to enforce in practice. While key reuse can be catastrophic for security, we know of a number of cryptographic schemes for which it is provably safe. But existing formal models, such as the notions of joint security (Haber-Pinkas, CCS '01) and agility (Acar et al., EUROCRYPT '10), do not address the full ...More
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