security fundamentals for e commerce phần 9 pps

... credentials to the gatekeeper. The gatekeeper verifies whether the credentials are valid by passing them to the credential checker. If the credentials are valid, the capability service creates ... requirements may be specified in the requestors cre- dentials (e. g., the agent owners credentials) or in an object reference (e. g., the agent reference). Mobile Agent Security 3 49 work unde...

Ngày tải lên: 14/08/2014, 18:21

... stolen coins. There are, however, some mechanisms to prevent stealing of coins, and they are used to implement the corresponding payment security service. The three digital money security services ... the acquirer communicate directly, the certificate is sent to the payee to be for- warded to the payer. Finally, if everything has gone well, the payee sends a payment receipt (Payees Pay...

Ngày tải lên: 14/08/2014, 18:21

... are 142 Security Fundamentals for E- Commerce not the case, so we have, for example, a public switched telephone network, a mobile telephone network, and the Internet. However, there are already ... Chapter 1 showed the placement of security services and mechanisms in the OSI reference model. Connection-oriented security serv- ices apply to end-to-end connections. More specific...

Ngày tải lên: 14/08/2014, 18:21

... ServerKeyEx- change message. The ServerKeyExchange message contains a public key for 230 Security Fundamentals for E- Commerce Client Server ClientHello [ChangeCipherSpec] Finished Certificate ClientKeyExchange CertificateVerify [ChangeCipherSpec] Finished ServerHello Certificate CertificateRequest ServerHelloDone Figure ... dif- ferent key management systems (e. g., Kerberos) can...

Ngày tải lên: 14/08/2014, 18:21

... Data Hassler, Vesna Security fundamentals for e- commerce.  (Artech House computer security series) 1. Business enterprisesComputer networks Security measures 2. Electronic commerce Security measures ... encrypted; • Each key be used only once. This is exactly the case with the one-time pad. Unfortunately, it makes key management extremely difficult, since new keys must be exch...

Ngày tải lên: 14/08/2014, 18:21

... PGP Message Exchange Formats, The Internet Engineering Task Force, RFC 199 1, Aug. 199 6. [ 19] Elkins, M., MIME Security with Pretty Good Privacy (PGP), The Internet Engi- neering Task Force, ... only) are public 44 Security Fundamentals for E- Commerce • affiliationChanged: some fields in the certificate have changed (e. g., subject name); • superseded: the certificate has be...

Ngày tải lên: 14/08/2014, 18:21

... appended to it before transmission. If higher level protocols do not use sequence numbers, a sequence number can be appended to the SDU before MAC is computed. Sequence numbers provide replay/reordering ... denotes concatenation): response = MD5(identifier || shared_secret || challenge) When the authenticator receives the response packet, it computes the response value in the same way and com...

Ngày tải lên: 14/08/2014, 18:21

... server). The Via request or response header is used by intermediaries (e. g., proxies) to indicate the intermediate protocols and recipients between the cli- ent and the server (request), and between the ... contents (i .e. , HTTP request). 266 Security Fundamentals for E- Commerce 16 Web Server Security Access control management on the Web server side is even more difficult than o...

Ngày tải lên: 14/08/2014, 18:21

... can also be generated for other possibly unsafe languages. Therefore, the first Java security checks are performed by the byte- code verifier to verify whether the Java bytecode conforms to Java ... Inspection Before JDK 1.2 was released, browsers needed some means of providing a more flexible security policy than the very restrictive sandbox model. There are several techniques for ac...

Ngày tải lên: 14/08/2014, 18:21

... 178 Security- enhanced application, 251 Security kernel, 246 Security label, 8, 43 Security level, 2 79 Security manager, 3 09 Security mechanisms, 5 Security message exchange, 1 69 Security parameter ... bottlenecks to the development of new e- commerce services (e. g., network speed and thin clients in m -commerce) . Security enhancements often introduce an additional...

Ngày tải lên: 14/08/2014, 18:21