Cell Phone: Difference between revisions
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(Rescuing 1 sources and tagging 0 as dead. #IABot (v2.0beta9)) |
(GSM has encryption but the standard is deliberately weak (maybe 40 bits or so?) due to pressure from governments, France in particular) |
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** On TV, when somebody hangs up on another person while speaking on a cell phone, there's an audible click as if it were a landline phone. Some [[Real Life]] phones beep when a call ends; others go dead silent. |
** On TV, when somebody hangs up on another person while speaking on a cell phone, there's an audible click as if it were a landline phone. Some [[Real Life]] phones beep when a call ends; others go dead silent. |
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** Similarly, when making a call using the cellphone's phonebook, the phone will sometimes [[Beeping Computer|beep out the number in DTMF]], as though it has to dial the number. |
** Similarly, when making a call using the cellphone's phonebook, the phone will sometimes [[Beeping Computer|beep out the number in DTMF]], as though it has to dial the number. |
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* Cell phone communications are ultra secure. In [[Real Life]], the signal could be picked up and decrypted by radio until the advent of [[wikipedia:GSM|GSM]] and its successor [[wikipedia:UMTS|UMTS]], which use |
* Cell phone communications are ultra secure. In [[Real Life]], the signal could be picked up and decrypted by radio until the advent of [[wikipedia:GSM|GSM]] and its successor [[wikipedia:UMTS|UMTS]], which use adequate (but not bulletproof) encryptions, as well as features such as [[wikipedia:Frequency hopping|Frequency Hopping]]. |
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And then there's the behavior associated with using a cellphone: |
And then there's the behavior associated with using a cellphone: |
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