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- W2891680364 abstract "Most TLS clients such as modern web browsers enforce coarse-grained TLS security configurations. They support legacy versions of the protocol that have known design weaknesses, and weak ciphersuites that provide fewer security guarantees (e.g. non Forward-Secrecy), mainly to provide backward compatibility. This opens doors to downgrade attacks, as is the case of the POODLE attack [18], which exploits the client’s silent fallback to downgrade the protocol version to exploit the legacy version’s flaws. To achieve a better balance between security and backward compatibility, we propose a DNS-based mechanism that enables TLS servers to advertise their support for the latest version of the protocol and strong ciphersuites (that provide Forward-Secrecy and Authenticated-Encryption simultaneously). This enables clients to consider prior knowledge about the servers’ TLS configurations to enforce a fine-grained TLS configurations policy. That is, the client enforces strict TLS configurations for connections going to the advertising servers, while enforcing default configurations for the rest of the connections. We implement and evaluate the proposed mechanism and show that it is feasible, and incurs minimal overhead. Furthermore, we conduct a TLS scan for the top 10,000 most visited websites globally, and show that most of the websites can benefit from our mechanism." @default.
- W2891680364 created "2018-09-27" @default.
- W2891680364 creator A5030231646 @default.
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- W2891680364 date "2019-01-01" @default.
- W2891680364 modified "2023-09-25" @default.
- W2891680364 title "DSTC: DNS-Based Strict TLS Configurations" @default.
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- W2891680364 doi "https://doi.org/10.1007/978-3-030-12143-3_9" @default.
- W2891680364 hasPublicationYear "2019" @default.
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