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authorDistix listener <distix@pieni.net>2016-06-22 00:45:06 +0200
committerDistix listener <distix@pieni.net>2016-06-22 00:45:06 +0200
commit2b472f041e13121c9582e9b4d0ca24db2219a184 (patch)
tree370133f3ce02092ba914f204a5e690d5fb19165a /tickets/cb75a21b4a874f86ba49e06ae8d887fc
parent8515c5754a62525e49d557c0239a757a3dbf015b (diff)
downloadobnam-dev-distix-2b472f041e13121c9582e9b4d0ca24db2219a184.tar.gz
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+Date: Tue, 21 Jun 2016 22:43:29 +0000
+From: "Robin H. Johnson" <robbat2@gentoo.org>
+To: obnam-support@obnam.org, obnam-dev@obnam.org
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+--===============4727345661079074573==
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+ protocol="application/pgp-signature"; boundary="2WS97oupGEGbYNpW"
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+
+On Sun, Jun 19, 2016 at 10:53:37PM +0200, Adrien CLERC wrote:
+> Le 19/06/2016 =E0 10:39, Robin H. Johnson a =E9crit :
+> > - Plan for moving to PyCrypto or other for symmetric crypto
+> I totally understand the goal, and can only support you. However,
+> PyCrypto is not compatible with PyPy, as 'Cryptography' is. That's why
+> paramiko did the switch recently (http://www.paramiko.org/changelog.html).
+> Based on https://github.com/paramiko/paramiko/pull/394 it seems that the
+> switch is better on every aspect. Do you have the time to inspect this
+> solution?
+If you look at email 2/2, the big concern isn't which toolkit we pick,
+but that the data can be linked to the correct toolkit when it comes
+time to decrypt it later, and that old chunks are also still correctly
+handled.
+
+I have used Crytography.io elsewhere, and it was on par with PyCrypto
+performance for what I was doing, but I didn't benchmark heavily.
+
+At that point, with files including a header that describes how we need
+to handle them, encryption.py can become an interface, and we can
+implement many variations.=20
+
+Example variations:
+1. Pure GPG (present state)
+2. GPG for asymmetric, PyCrypto/Cryptography.io/PyNaCl for symmetric
+3. Pure PyCrypto/Cryptography.io/PyNaCl
+4. Upgrade path variations - Read ANY, write Y
+
+#2 would be a trivial upgrade for existing repos: just upgrade all of
+your clients and enable it. Old chunks would continue to be encrypted
+with GPG, and still readable, while new chunks are generated much
+faster.
+
+If you don't care about the above, you can have a PyCrypto or
+Cryptography.io implementation tomorrow, but recovering your data in
+future disasters will be much more painful.
+
+--=20
+Robin Hugh Johnson
+Gentoo Linux: Dev, Infra Lead, Foundation Trustee & Treasurer
+E-Mail : robbat2@gentoo.org
+GnuPG FP : 11ACBA4F 4778E3F6 E4EDF38E B27B944E 34884E85
+GnuPG FP : 7D0B3CEB E9B85B1F 825BCECF EE05E6F6 A48F6136
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+Version: GnuPG v2.1
+Comment: Robbat2 @ Orbis-Terrarum Networks - The text below is a digital signature. If it doesn't make any sense to you, ignore it.
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+_______________________________________________
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