ZyXEL Communications Network Router wireless active fiber router Uživatelský manuál stáhnout pdf (Strana 150)

Appendix D Wireless LANs

FSG1100HN User’s Guide

150

If this feature is enabled, it is not necessary to configure a default encryption

key in the Wireless screen. You may still configure and store keys here, but

they will not be used while Dynamic WEP is enabled.

Note: EAP-MD5 cannot be used with dynamic WEP key exchange.

For added security, certificate-based authentications (EAP-TLS, EAP-TTLS

and PEAP) use dynamic keys for data encryption. They are often deployed in

corporate environments, but for public deployment, a simple user name and

password pair is more practical. The following table is a comparison of the

features of authentication types.

Comparison of EAP Authentication Types

EAP-MD5

EAP-TLS

EAP-TTLS

PEAP

LEAP

Mutual

Authentication

Yes

Certificate – Client

Yes

Optional

Certificate – Server

Yes

Dynamic Key

Exchange

Yes

Credential Integrity

None

Strong

Moderate

Deployment

Difficulty

Easy

Hard

Moderate

Client Identity

Protection

Yes

WPA(2)

Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i standard.

WPA2 (IEEE 802.11i) is a wireless security standard that defines stronger

encryption, authentication and key management than WPA.

Key differences between WPA(2) and WEP are improved data encryption

and user authentication.

Encryption

Both WPA and WPA2 improve data encryption by using Temporal Key

Integrity Protocol (TKIP), Message Integrity Check (MIC) and IEEE 802.1X.

In addition to TKIP, WPA2 also uses Advanced Encryption Standard (AES) in

the Counter mode with Cipher block chaining Message authentication code

Protocol (CCMP) to offer stronger encryption.

Temporal Key Integrity Protocol (TKIP) uses 128-bit keys that are

dynamically generated and distributed by the authentication server. It

includes a per-packet key mixing function, a Message Integrity Check (MIC)

named Michael, an extended initialization vector (IV) with sequencing rules,

and a re-keying mechanism.

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