Symbol Technologies AP-4131 manual Encryption Configuration and Key Maintenance

Configuring the AP

2.6Encryption Configuration and Key Maintenance

The Encryption Key Maintenance screens allow the user to configure the encryption keys used for the site network. The Key Width determines which encryption Key screen displays. To enable the Open System option, select Disabled for Shared Key from the System Summary screen.

This table shows the association capability with the selected Key Width.

AP Selected WEP	MU Selected WEP	Association Status
Algorithm	Algorithm
Open (disable)	Open	Associated
Open (disable)	40	No Association
Open (disable)	128	No Association
40	Open	No Association
40	40	Associated
40	128	Associated, but cannot
		transmit data
128	Open	No Association
128	40	Associated, but cannot
		transmit data
128	128	Associated

Each 40-bit encryption key is a subset of the respective 128-bit encryption key. The first 40 bits of each encryption key is the same for the respective 40-bit and 128-bit encryption keys. When a 40-bit encryption key is changed the first 40 bits of the respective 128-bit key is also changed. Consequently, when a 128-bit encryption key is changed the first 40 bits of the 40-bit encryption key is changed. Moreover, configuring the encryption Keys using the SNMP Trap Manager overrides the Key value(s) for the AP(s) accessed by the SNMP Trap Manager.

Symbol provides a total of four Encryption Keys. Each key enables encryption between the AP and an associated MU with the same encryption Key and Key value.

88 AP-4131 Access Point Product Reference Guide