security fundamentals for e commerce phần 3 pps

... chap- ter, these new services are defined. The definitions result from a generaliza- tion of the payment security techniques used in existing electronic payment systems. 5.1 Payment Security Services This ... 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...

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 ... ServerKeyExchange message can also be sent after the serv...

Ngày tải lên: 14/08/2014, 18:21

... commercial relationships. Roles are implemented with digital 32 6 Security Fundamentals for E- Commerce Code time Gatekeeper Credential checker Capability service request with credentials check credentials create ... 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 ca...

Ngày tải lên: 14/08/2014, 18:21

... be encrypted. The key, however, must not be sent over the same channel, and this leads to a serious problem of symmetric cryptosystems: key management. The secret key must either be sent over ... 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 exchanged each time. The on...

Ngày tải lên: 14/08/2014, 18:21

... E- Commerce • affiliationChanged: some fields in the certificate have changed (e. g., subject name); • superseded: the certificate has been replaced by another; • cessationOfOperation: the certificate is no longer needed; • certificateHold: ... a digital envelope before being sent. Digital envelopes can have different formats, for example S/MIME or PGP. S/MIME (Secure/Multipurpose Intern...

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 ... 2716). 176 Security Fundamentals for E- Commerce Code ID Length Type Type-Data Figure 11.6 EAP packet format. three-way handshake between a client and a server, as shown in Figure...

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

... 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 achieving ... annotation is made on the current stack frame. • checkPrivilege(resource) is called by the system before accessing the resource. This method searches the stack for the enabled- privilege(re...

Ngày tải lên: 14/08/2014, 18:21

... 32 425 micropayment markup, 32 4 mobile agents, 33 3 XML-based concepts, 32 2 23 Electronic commerce database, 27880 Electronic commerce modeling language, 32 3 Electronic data interchange, 67, 32 2 Electronic ... 178 Security- enhanced application, 251 Security kernel, 246 Security label, 8, 43 Security level, 279 Security manager, 30 9 Security mechanisms, 5 Secu...

Ngày tải lên: 14/08/2014, 18:21