# Introduction - Cryptography and wireless security

## Chapter 5: Cryptography and wireless security

This chapter covers how SSL/TLS uses cryptographic tools (symmetric encryption, asymmetric encryption, and hashing) to secure data over the Internet, and how the IEEE 802.11 standard provides a basis for a wireless security management framework (client authentication, message privacy, and message integrity).

**This chapter will help students:**

* Develop a foundational understanding of how cryptographic tools (symmetric encryption, asymmetric encryption, and hashing) secure Internet communications via SSL/TLS.
* Understand how symmetric encryption (e.g., AES), asymmetric encryption (e.g., RSA), and hashing (e.g., SHA-256) secure data in transit.
* Describe how digital certificates and asymmetric keys enable authentication and message signing.
* Develop a practical understanding of RSA’s key generation, encryption, and signing capabilities.
* Describe the TLS handshake process, from negotiating cryptographic parameters to securely establishing a shared session key.
* Develop a practical understanding of the Diffie-Hellman key exchange, its role in providing forward secrecy in TLS, and the underlying mathematics that make it secure.
* Understand how the IEEE 802.11 standard provides a basis for a wireless security management framework (client authentication, message privacy, and message integrity).
* Become familiar with key authentication methods and encryption and message integrity algorithms used in securing wireless networks.
* Compare wireless security protocols (WPA/WPA2/WPA3) and their authentication and encryption methods.

## Topics covered in this chapter

[Hashing algorithms and message integrity](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/hashing-algorithms-and-message-integrity)

[Cryptographic encryption and confidentiality](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/cryptographic-encryption-and-confidentiality)

[Message signing using asymmetric keys](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/message-signing-using-asymmetric-keys)

[Cryptographic authentication methods](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/cryptographic-authentication-methods)

[The SSL/TLS handshake](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/the-ssl-tls-handshake)

[How SSL/TLS uses cryptography](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/how-ssl-tls-uses-cryptography)

[Replay attacks and anti-replay methods](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/replay-attacks-and-anti-replay-methods)

[Wireless client authentication methods](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/wireless-client-authentication-methods)

[Wireless privacy and integrity methods](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/wireless-privacy-and-integrity-methods)

[Authentication and encryption in WPA, WPA2, and WPA3](https://dti-techs.gitbook.io/practical-foundations-in-cybersecurity/5.-cryptography-and-wireless-security/authentication-and-encryption-in-wpa-wpa2-and-wpa3)


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