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Glossary of Terms


802.1X is a standard for port-based network access control.  This provides for authentication of users attaching to the network and preventing access if authentication fails.  Johns Hopkins uses the JHED Directory to validate users.

WPA - Wifi Protected Access:

WPA is the replacement for WEP, used for encryption of wireless data.  WPA is designed to enhance the security of wireless networks.  There are two flavors of WPA.  WPA-Personal is the less scalable type used at home, requiring the use of pre-shared keys.  Every computer is given the same passphrase, so security depends on the strength of the passphrase.  The second type is WPA-Enterprise, used here at Johns Hopkins.  This type of security is meant to work with an 802.1X authentication server to distribute different keys to each user.

PEAP - Protected Extensible Authentication Protocol:

PEAP is the authentication protocol used to securely transmit passwords over the wireless network.  PEAP uses server-side public key certificates to authenticate the server.  It then creates an encrypted TLS tunnel between the client and authentication server.  The ensuing exchange is encrypted and user credentials are safe from eavesdropping.


This is the inner authentication protocol used for the exchange of JHED credentials to authenticate to the wireless network.

AES - Advanced Encryption Standard:

AES is a powerful 256-bit encryption algorithm, used to secure wireless data.

JHED - Johns Hopkins Enterprise Directory:

JHED is a database of all John Hopkins affiliated persons.