【大学课件】信息通信：Security in 802.16.ppt

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1、Securityin 802.16,Overview,Typical threats of any wireless networksWireless security-802.16WiMAXs prospect,Typical threats of any wireless networks,Malicious entities can gain access to the network，information can be intercepted，DoS attacks，the miscreants can masquerade as legitimate users，Viruses a

2、nd other malicious code。,Malicious User,Typical threats of any wireless networksWireless security-802.16WiMAXs prospect,Advantages of-802.16,ranges up to 50Kms，no LOS required，and data transfer rates up to 70 Mbps.,Network Entry of a SS,scans downlink signal，establishes a PMC with BS,PKM authorizes

3、the SS to the BS,BS upon a request message registers the SS,BS sends a response for a secondary management connection,SS and BS create transport connections.,Searching BS,Security architecture,1,Encapsulation protocolencrypting the data packets.2,Key Management Protocolsecure distribution of the key

4、ing data from BS to SS.,Authorization SA,X.509 certificateAuthorization key(AK),lifetime of AK,the Key encryption key(KEK),SS,BS,Auth Info,Auth reply(AK0),Auth Req,Auth Req,Auth Req,Auth Reply(AK1),Auth Reply,AK0ALT,AK1ALT,AK0 ALT,AK1 ALT,AK2ALT,AK2ALT,AK Usage,Key Req(AK1),Key Req(AK2),State Machin

5、e（SS）,Wireless security-802.16compare with security in 802.11 WiMAXs prospect,WiMAX Forum,over 250 members:France Telecom,Deutsche Telecom,Telenor,British Telecom,UK Broadband,Altitude Telecom,China motion telecom etc.Intel,Alcatel,Siemens,Ericsson,Nokia etc.1000s of deployments in over 130 countries,Thank You!,