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ISP Information:
A simple form of standalone application architecture where everything resides in a single program. Contrast this to 2-tier and 3-tier architectures.
ISP Glossary:
1-tier architecture - Dear All,I'm looked through various archives and I seem to have come up with amixed bag when it comes to SMS.Some people have stated that there is no encryption on SMS messageswhen broadcast (and no authentication of the originating number) whileothers have stated that the same authentication is used as for voice(i.e. A3 to authenticate the connection and A5 to encrypt the session)Now ... I reckon there must be some form of accurate authentication tofacilitate billing. Can I assume that the connection to the SMSrepository is authenticated in the same way as a voice connection (A3,Comp128)?But does the data in the SMS get encrypted, and does this include theCallerID (i.e. is the CallerID seperate to whatever is used forbilling).1. I want to know how difficult it is to snoop the text in the SMS (Irealise that the GSM implementation A5/1 isn't highly regarded)2. I want to know how difficult it is to spoof an SMS (not to defraudthe billing operator but to confuse or misdirect the recipient of theSMS)Can anyone point me to security papers about SMS (there are plentyabout GSM in general, but SMS barely gets a mention).I am given to understand that the SMS messages aren't encrypted whilestored on the service providers server and there's no way of workingout whether they are encrypted in transit across the providers network(so maybe this is where the confusion about encryption has come in)Any comments gratefully received.John
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