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An In-depth Look at Wireless WAN Security: Cellular Digital Packet Data Networks and their Security Issues
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hatefi, Farid G. |
| Copyright Year | 2003 |
| Abstract | Today’s technology imposes restricted requirements on the corporate users for constant access to their corporate resources. Few instances of these resources are corporate e-mail or web services. Many of these corporate users are mobile, either traveling far or near the physical location of their office. Sometimes it is essential for these remote users to have immediate access to their company resources. Wireless WANs provide the most rapid way of accessing these resources. Cellular Digital Packet Data (CDPD) network is one of the most common wireless infrastructures that is being implemented nationwide today. A CDPD network is an overlay service on top of the existing AMPS (Advanced Mobile Phone Systems) cellular voice networks. A mobile unit in a CDPD n twork, also known, as Mobile End System (MES) is a computer with a CDPD modem. It has adequate capability for being mobile while connected to the CDPD network. The CDPD network, on the other hand, guaranties the packet delivery to the MES, while MES constantly changes its physical location. In order for an MES to have access to a CDPD network it must be authenticated either directly by Mobile Data Intermediate System’s (MDIS) Mobile Home Function (MHF), while an MES’ is in its home area or through MDIS’s Mobile Serving Function (MSF) while roaming. After a successful authentication MES can access public networks such as internet. Although CDPD networks provide some level of encryption and authentication, the authentication scheme is unilateral, i.e. only MES are being authenticated by MHF. Neither MHF nor MSF will be authenticated by MES. In the meantime the traffic encryption is only available over the radio frequency. The lack of a bilateral authentication and partial route encryption are two of the major security concerns in CDPD networks. In this paper the security architecture of a CDPD network will be scrutinized and some possible solutions will be investigated. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.sans.org/reading-room/whitepapers/wireless/in-depth-wireless-wan-security-cellular-digital-packet-data-networks-security-1223 |
| Alternate Webpage(s) | https://www.sans.org/reading-room/whitepapers/wireless/in-depth-wireless-wan-security-cellular-digital-packet-data-networks-security-issues-1223 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
