Re: " Welcome to the Quantum Internet" - By Davide Castelvecch
On Fri, 22 Aug 2008, Robert J. Hansen wrote:
. . .
reynt0 wrote:
Wouldn't the claim be: "cannot listen in on such a
transaction between Alice and Bob without affecting the
transaction in a detectable way"?
Depends on how pedantic you want to be, and how you define
'transaction'. Frankly, if I were to have proof of an eavesdropper, I
would consider the transaction to be compromised and I'd scrub it.
Hence, QM makes it possible to have a key transaction between Alice and
Bob guaranteed to be free of eavesdroppers.
IIRC, the last time I read in detail about this, there was
bit-by-bit analysis of a full communication A->B, and
unconfirmed bits were removed from the total exchange,
leaving confirmed bits to constitute the exchanged key
(ie the key offer sent from Alice to Bob). The cause of
a bit being unconfirmed could be evesdropper "touching"{*}
the bit, circuit noise, etc, so of course DOS is obviously
available by evesdropping on all the bits. (I'll not try
to state here the reasoning behind the confirmation process,
I'd have to look it up to satisfy myself my memory was good
enough to say anything publicly about it :-) .)
{*}: I've seen lately, but not reviewed in detail, mentions
of successfully copying photon qbits, by tricky secondary
entanglements, this possibly enabling a functional equivalent
to store-and-forward of photons in their original entanglement
state. I think the information was maybe in _Nature_, within
the past couple of months??, maybe in one of the June 19
articles re quantum stuff (which included an article "The
Quantum Internet" which was listed at the _SN_ article which
started this thread)?
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Re: Securely delete files...
On Fri, 22 Aug 2008, David Shaw wrote: OS X is an interesting case. The standard filesystem, as you note, is HFS+ with journaling. Usually this is a danger sign for shredding as the shred process doesn't know all the information it needs to do a proper shredding job. However, Apple has shredding built-in to OSX, and since both the shredder and the filesystem come from the same people, it's at least possible that they did the necessary work to have this shred properly (i.e. in a journal-sensitive way). Did they actually do this? I have no idea, and would be curious to hear from someone who does have a reference on this one way or the other. Apple tends to be fairly stingy about this level of detail. = test it! fill a file with a few hundred copies of a random hash. as a control, delete the file the normal way and try to find it on the disk (i'd expect you can find it). repeat with a different hash, shred the file, and try again to find it on the disk. -- ...atom http://atom.smasher.org/ 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808 - "The National Government will regard it as its first and foremost duty to revive in the nation the spirit of unity and cooperation. It will preserve and defend those basic principles on which our nation has been built. It regards Christianity as the foundation of our national morality, and the family as the basis of national life." -- Adolph Hitler Proclamation to the German nation at Berlin, 1 February 1933 ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
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Hi, I am facing some problem while decrypting a file using Gnupg. Could you please help me out? Thanks & Regards, Varun.K ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: can't change to my real name on this mailing list
-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 kurt c wrote: > I don't know if this is more of a ThunderBird question. I have already > changed this dummy kurtc name to my real name lawrence in the setting of > my Gmail account, but somehow on this mailing list I still appear as > "kurtc". I read it's because the outgoing server name is still under the > name of "kurt c", and this outgoing server name can be changed under the > "Tools" dropdown list. But somehow I don't see any outgoing server > choice under the "Tools" section of my Enigmail. Can anyone give me some > idea? Thunderbird Account Settings; Click on the Name of the Account and fill in the "Your Name" box with the preferred display. JOHN ;) Timestamp: Saturday 23 Aug 2008, 06:52 --400 (Eastern Daylight Time) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10-svn4815: (MingW32) Comment: Public Key at: http://tinyurl.com/8cpho Comment: Gossamer Spider Web of Trust: https://www.gswot.org Comment: Homepage: http://tinyurl.com/yzhbhx iQEcBAEBCgAGBQJIr+wJAAoJEBCGy9eAtCsPbU0H/R72fFR1jqzlti7tPqDHNP9J WGg+xwBap3Xqgw2xBxHpzfQRyn/Sh3EYkiij/HTTdcbSRxfaem3h7+msMitCCsCl r3dVMRDT0wID115CKMMTT7blhGD922T8qmagJ1Wzjro0OdiKEThbGeWUxGNYcaeQ pMgUoLYbckHfN81x9eMGNKcaARaqcQI/4da7I+X3C8/GOexLez+JZIbBwxXV3naF dgNSBDI1HYGaw3Sw0DnUIsHs0Q1jgmWssZIK7/4oGa3kIyyCGZV8bUuwro6Kp2/z mwMvS4mI17/I7tF+svhnmtDKNWkgm9ZxKwKl0wksUzIoxlOj6z1tg5hvNJidbBo= =VdIs -END PGP SIGNATURE- ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Securely delete files...
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 reynt0 escribió: > On Thu, 21 Aug 2008, David Shaw wrote: ... >> whether the filesystem you are using overwrites in place or not. Many >> modern filesystems (Reiser, XFS) do not necessarily overwrite in >> place. More primitive filesystems (like the FAT FS that is used on >> many external disks) do overwrite in place. Linux systems most ... > Might anyone have any quick info about this issue for MacOS? > From, say, OS10.2's HFS+, through OS10.3 and 10.4's journaled > HFS+, to whatever the current OS10.5 does if different? I would be interested in learning about the subject for windows xp sp2... By the way, I was reading about Kingson Data Traveler USB flash drive memory stick, and it also comes with "spare sectors", and manages them in "mysterious ways", so probably, it is not possible to delete a file in a "secure" way... In conclusion... the hammer-volcano-termite solution is the only reliable solution... which doesn't mean we can't try to do it in a less destructive way, *provided we can afford the failure to archive success* Best Regards -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQEcBAEBCAAGBQJIr70yAAoJEMV4f6PvczxAzq4H/RxbHztX2JRb536i8b0Z4ue6 5j1Z793zswNPaJGZwsfxe5tH/WiDWPoR54J7P3VtC/jDK1OAsPfuz0ZDAXRuA32h V8SnXD5lfNuyLkr8D7fd5XKhrOYDlBM6Y8i1775/4r5iPh+zdneV7QI4nJ3ZOKwR +2Q3pcc05cIgRA7q4jHPx4uw0Ac/wSnFm/UcHcoDWGAz4pzOcjZsBBIFGPxRtQ5s tGockVMpgcOhVK3ehyOu5cR5UJkmXXPjTG2u13CvFai7+j864AWhF/H2Z6WvANHt NcgPQyp0zxlchWv+MZTn9l5natXeG1J7U4j/zFc3w6WRjuIYJEE6GcTTDHtVVg0= =iq9L -END PGP SIGNATURE- ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: can't change to my real name on this mailing list
kurt c wrote: > I don't know if this is more of a ThunderBird question. I have already > changed this dummy kurtc name to my real name lawrence in the setting of > my Gmail account, but somehow on this mailing list I still appear as > "kurtc". I read it's because the outgoing server name is still under the > name of "kurt c", and this outgoing server name can be changed under the > "Tools" dropdown list. But somehow I don't see any outgoing server > choice under the "Tools" section of my Enigmail. Can anyone give me some > idea? In Thunderbird, Edit -> Account Settings -> -> Your name should do it. And Enigmail has nothing to do with how accounts are set up; that is all Thunderbird's responsibility. -- Key ID: 0xF88E034060A78FCB Fingerprint: 4A84 CAE2 A0D3 2AEB 71F6 07FD F88E 0340 60A7 8FCB Windows NT 6.0.6001.18063 | GPG 1.4.9 | Thunderbird 2.0.0.16 | Enigmail 0.95.7 ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
