1 / 19

Wireless Network Security

FORE SEC Academy Security Essentials. Wireless Network Security. Objectives. Learn how wireless networks are used Wireless architecture and protocols Common misconceptions Top 5 security risks Steps to planning a secure WLAN. Popular Wireless Devices.

koko
Download Presentation

Wireless Network Security

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. FORESECAcademySecurity Essentials Wireless Network Security

  2. Objectives • Learn how wireless networks are used • Wireless architecture and protocols • Common misconceptions • Top 5 security risks • Steps to planning a secure WLAN

  3. Popular Wireless Devices • Personal Digital Assistants (PDA) • Cellular Phones • Handheld Computers • Laptops • Pagers

  4. Wireless Advantages • Wiring takes time and money; wireless drastically reduces these costs • Users can access the network from anywhere • Mobility and connectivity • Usable in environments where wiring is difficult - Historic buildings - Factories, assembly lines, warehouse floors, hospitals, and financial trading floors -Temporary networks, such as exhibitions

  5. Vertical Markets • Healthcare • Financial • Academia • Factories/Industrial • Retail

  6. Wireless Architecture andProtocols • Ad-Hoc Networks • Infrastructure Networks • WAP • Bluetooth • 802.11

  7. Ad-Hoc Architecture • Peer-to-peer networking • Unstructured connectivity • Used for LANs or PANs • Typically short-lived in duration • Often used for .point. connectivity • solutions

  8. Infrastructure Architecture • Uses centralized access point or base station • Centralized authority for access to the medium • Typically responsible for security • Communicates with other centralized peers for roaming

  9. Wireless Application Protocol(WAP) • WAP forum formally approved WAP 2.0 • Operates over a multitude of different wireless technologies: -Cellular Digital Packet Data (CDPD), Code Division Multiple Access (CDMA), and Global System Mobile (GSM) • Enables a multitude of wireless devices, including cell phones and PDAs, to have common access to the Internet • Built-in security at the transport layer

  10. The “WAP Gap” • WTLS: Wireless Transport Layer Security • Used in version before WAP 2.0 • Requires WAP gateway to decrypt WTLS • transmission, and then re-encrypt as TLS/SSL • Sensitive data is exposed as it traverses the • gateway

  11. Protecting Gateways • Ensure that WAP gateway never stores decrypted content on secondary media • Implement additional security at higher protocol layers • Physically secure the WAP gateway • Limit remote administrative access to the WAP gateway to inside the corporate firewall boundary • Add WAP devices to your PKI

  12. Bluetooth • Used to connect disparate devices - Laptops, PDAs, and cell phones • Maximum bandwidth: 1 Mbps • No line-of-sight requirement • Supports data, voice, and content-centric applications • High degree of interference immunity • Up to seven simultaneous connections

  13. Bluetooth Security • End user utilizes a PIN that is 4-16 bytes in length between multiple devices • Bluetooth uses the pin and its MAC address to generate security keys • Keys are used to authenticate Bluetooth “peers” and to encrypt transmission data

  14. Bluetooth Security Issues • Susceptible to eavesdropping • Encryption mechanisms are often weak • Simple PIN numbers are often poorly selected and inadequate security • Tools such as RedFang and BlueSniff aredesigned to locate Bluetooth networks

  15. 802.11 Wireless • Supports ad-hoc and infrastructure networks • Supports roaming, fragmentation and reliable data delivery (positive acknowledgement) • Branched into 802.11a, 802.11b, and 802.11g -802.11a supports up to 54 Mbps @ 5GHz - 802.11b supports up to 11 Mbps @ 2.4GHz - 802.11b supports up to 11 Mbps @ 2.4 GHz

  16. WEP Security Issues • WEP has proven to be an insecure encryption mechanism • Shared secrets do not remain secretive • Inability to rotate WEP keys produced stagnant shared secret implementations • Flaws in WEP implementation permit recovery of shared secrets • Accelerated WEP cracking becoming common

  17. Improved 802.11 Security • IEEE 802.11i and 802.1x committees tasked with securing WLANs • 802.1X protocols improve WLAN security, but are still fallible • WPA-I protocol is better, but still has weaknesses that can be exploited • Future 802.11i/AES encryption has positive outlook

  18. Common Misconceptions • General misconceptions • Technical misconceptions • Risk misconceptions

  19. General Misconceptions • “I don’t need to worry about security because we aren’t using wireless for sensitive data” • “We don’t have any wireless”

More Related