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- From: karn@servo.qualcomm.com (Phil Karn)
- Subject: Re: Privacy -- encrypt/decrypt devices on Wireless phones
- Message-ID: <1992Dec29.205656.7053@qualcomm.com>
- Sender: news@qualcomm.com
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- Organization: Qualcomm, Inc
- References: <1hpsm7INNp2i@usenet.INS.CWRU.Edu> <1992Dec29.183101.4176@mnemosyne.cs.du.edu>
- Date: Tue, 29 Dec 1992 20:56:56 GMT
- Lines: 33
-
- In article <1992Dec29.183101.4176@mnemosyne.cs.du.edu> rwirthli@nyx.cs.du.edu (Ralph Wirthlin) writes:
- >Although "secure" wireless phones may exist, it would be impossible
- >for the general public to obtain one. Strictly speaking, a "secure" device
- >would allow discussion or dissemination of classified material
- >over a non-secure link (i.e. phone lines, air waves) and thus
- >would be unavailable to the public.
-
- Well, if by "secure" you mean "authorized for the protection of
- classified information", you're right. The government only authorizes
- NSA's (secret) algorithms for this purpose. But properly used, even
- publicly available ciphers like RSA and DES could still provide a very
- high degree of protection. Perhaps even against the NSA.
-
- >It may not be right, but it certainly is legal as long as the contents
- >of that conversation are not disclosed. Cellular conversations are
- >"protected" from eavesdropping thanks to the fine folks on capitol hill.
-
- It's worse than that. Cordless phones are not protected *at all*. This
- has been upheld in two court cases (Rhode Island and Kansas, I think)
- where a neighbor overheard a cordless phone user discuss drug dealing
- or other illegal activities and reported it to the police. The police
- then used the information against the suspect without a warrant. The
- courts ruled that there was no "expectation of privacy" on a cordless
- phone, so the evidence was admissible.
-
- On the other hand, you're right that cellular conversations require a
- warrant despite their using the exact same modulation method (FM) and
- considerably more RF power than a cordless phone. It is theorized that
- this state of affairs has something to do with there being a powerful
- domestic cellular industry in the US, but no corresponding domestic
- industry for cordless phones.
-
- Phil
-