Leveraging transport-layer cryptographic material
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United States of America Patent
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Apr 2, 2019
Grant Date -
Jan 25, 2018
app pub date -
Sep 21, 2017
filing date -
Oct 2, 2015
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Abstract
A client application cryptographically protects application data using an application-layer cryptographic key. The application-layer cryptographic key is derived from cryptographic material provided by a cryptographically protected network connection. The client exchanges the cryptographically protected application data with a service application via the cryptographically protected network connection. The client and service applications acquire matching application-layer cryptographic keys by leveraging shared secrets negotiated as part of establishing the cryptographically protected network connection. The shared secrets may include information that is negotiated as part of establishing a TLS session such as a pre-master secret, master secret, or session key. The application-layer cryptographic keys may be derived in part by applying a key derivation function, a one-way function or a cryptographic hash function to the shared secret information.
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