You're reading from TLS Cryptography In-Depth

Product typeBook

Published inJan 2024

PublisherPackt

ISBN-139781804611951

Edition1st Edition

Concepts

Cryptography

Authors (2):

Dr. Paul Duplys

Dr. Roland Schmitz

View More author details

12.5 TLS keys

TLS uses two types of secret keys. The Handshake Traffic Keys are are used for the encryption of the TLS handshake traffic. They are derived from the TLS secrets:

Alice’s key is derived from server˙handshake˙traffic˙secret
Bob’s key is derived from client˙handshake˙traffic˙secret

The Application Traffic Keys are used to encrypt the bulk application data that Bob and Alice transmit during their TLS session. Similar to handshake traffic keys, they are also generated from two different secrets:

server˙application˙traffic˙secret for Alice’s key
client˙application˙traffic˙secret for Bob’s key

Alice uses her handshake traffic key to encrypt one or more messages to Bob during the TLS handshake: EncryptedExtensions and, optionally, CertificateRequest, Certificate, and CertificateVerify.

The EncryptedExtensions message contains a list of extensions not necessary for establishing...

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TLS Cryptography In-Depth

Published in: Jan 2024Publisher: PacktISBN-13: 9781804611951

Authors (2)

Dr. Paul Duplys

Dr. Paul Duplys is chief expert for cybersecurity at the department for technical strategies and enabling within the Mobility sector of Robert Bosch GmbH, a Tier-1 automotive supplier and manufacturer of industrial, residential, and consumer goods. Previous to this position, he spent over 12 years with Bosch Corporate Research, where he led the security and privacy research program and conducted applied research in various fields of information security. Paul's research interests include security automation, software security, security economics, software engineering, and AI. Paul holds a PhD degree in computer science from the University of Tuebingen, Germany.
Read more about Dr. Paul Duplys

Dr. Roland Schmitz

Dr. Roland Schmitz has been a professor of internet security at the Stuttgart Media University (HdM) since 2001. Prior to joining HdM, from 1995 to 2001, he worked as a research engineer at Deutsche Telekom, with a focus on mobile security and digital signature standardization. At HdM, Roland teaches courses on internet security, system security, security engineering, digital rights management, theoretical computer science, discrete mathematics, and game physics. He has published numerous scientific papers in the fields of internet and multimedia security. Moreover, he has authored and co-authored several books. Roland holds a PhD degree in mathematics from Technical University Braunschweig, Germany.
Read more about Dr. Roland Schmitz

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