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The unofficial independent imode FAQ
8. Security on imode
8.1 Why is security an issue on imode?
Mobile commerce (mcommerce) is conducted on imode including mobile banking and security trading,
therefore security is a serious issue.
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8.2 Which kind of security issues are there on imode?
The security issues on imode are devided into different sectors:
(1) Security of the radio link between imode handset and the cellular base station (this link uses proprietary protocols and
encoding controlled by NTT DoCoMo.
(2) Security of the transparent public internet connection between imode sites and the handset in the chtml layer.
(3) Security of private networks on imode.
(4) Security of private network links between the imode center and special service providers such as banks.
(5) Password security.
Each of these different security issues needs to be addressed separately.
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8.3 Which security measures are implemented?
imode network and imode handsets are equipped for SSL (secure socket layer) encrypted transmission, and imode handsets
have unique identifiers allowing similar security to be implemented as on the wired internet. Mobile banking on imode
and corporate networks use SSL.
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8.4 What are the key practical security issues?
Practically speaking the most eye catching security issues on imode is "spam" and other nuicance email,
and "spam" telephone calls which attempt to get users to call premium telephone numbers with high charges.
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