delta/python-packages/pycrypto.git - github.com: dlitz/pycrypto.git

diff options


context:
space:
mode:

Diffstat (limited to 'pipermail/pycrypto/2011q4/000512.html')

-rw-r--r--

pipermail/pycrypto/2011q4/000512.html

184

1 files changed, 184 insertions, 0 deletions

diff --git a/pipermail/pycrypto/2011q4/000512.html b/pipermail/pycrypto/2011q4/000512.html
new file mode 100644
index 0000000..c0f67cb
--- /dev/null
+++ b/pipermail/pycrypto/2011q4/000512.html

@@ -0,0 +1,184 @@

+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">

+<HTML>

+ <HEAD>

+ <TITLE> [pycrypto] Public Key encryption of files

+ </TITLE>

+ <LINK REL="Index" HREF="index.html" >

+ <LINK REL="made" HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20Public%20Key%20encryption%20of%20files&In-Reply-To=20111111135434.A3951448059%40nhs-pd1e-esg109.ad1.nhs.net">

+ <META NAME="robots" CONTENT="index,nofollow">

+ <META http-equiv="Content-Type" content="text/html; charset=us-ascii">

+ <LINK REL="Previous" HREF="000510.html">

+ <LINK REL="Next" HREF="000513.html">

+ </HEAD>

+ <BODY BGCOLOR="#ffffff">

+ <H1>[pycrypto] Public Key encryption of files</H1>

+ John Matthew

+ <A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20Public%20Key%20encryption%20of%20files&In-Reply-To=20111111135434.A3951448059%40nhs-pd1e-esg109.ad1.nhs.net"

+ TITLE="[pycrypto] Public Key encryption of files">john at compunique.com

+ </A>

+ Fri Nov 11 14:22:46 CST 2011

+ <UL>

+ <LI>Previous message: <A HREF="000510.html">[pycrypto] Public Key encryption of files

+</A></li>

+ <LI>Next message: <A HREF="000513.html">[pycrypto] Public Key encryption of files

+</A></li>

+ <LI> Messages sorted by:

+ <a href="date.html#512">[ date ]</a>

+ <a href="thread.html#512">[ thread ]</a>

+ <a href="subject.html#512">[ subject ]</a>

+ <a href="author.html#512">[ author ]</a>

+ </LI>

+ </UL>

+ <HR>

+

+<PRE>Yes, I agree 100%, this is something I'm not taking lightly, that's why I'm

+trying to get it right the first time :).

+Ill checkout your link, thank you very much for your input.

+On Fri, Nov 11, 2011 at 5:54 AM, Imran Azad <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">Imran.Azad at bthft.nhs.uk</A>> wrote:

+> *Please note my new email address <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">Imran.Azad at bthft.nhs.uk</A>*

+>

+> John,

+>

+> I don’t mean to steal your thunder, I noticed you asked a question about

+> the suitability of public key cryptography for file encryption and the use

+> of padding. Unless one is an expert in cryptography I don’t think it’s a

+> good idea to encrypt sensitive data using your own scheme as cryptography

+> is very easy to get wrong with catastrophic consequences, even ‘experts’

+> make mistakes. Rather it would be safer to use an established scheme, you

+> also need to think about the integrity of what you are encrypting –

+> although you may have taken this into account. I am not an expert in

+> cryptography and I appreciate and admire the work that has gone into

+> PyCrypto. I am speaking from past experiences and I thought I would share

+> these with you.

+>

+> You may find this link useful:

+> <A HREF="http://security.stackexchange.com/questions/8571/rsa-4096-with-aes-256-encryption-process-using-pycrypto">http://security.stackexchange.com/questions/8571/rsa-4096-with-aes-256-encryption-process-using-pycrypto</A>

+>

+> Kind Regards

+>

+> *From:* <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto-bounces at lists.dlitz.net</A> [mailto:

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto-bounces at lists.dlitz.net</A>] *On Behalf Of *John Matthew

+> *Sent:* 10 November 2011 18:32

+>

+> *To:* PyCrypto discussion list

+> *Subject:* Re: [pycrypto] Public Key encryption of files

+>

+> All good stuff, thanks Dave

+>

+> On Thu, Nov 10, 2011 at 10:26 AM, Dave Pawson <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">dave.pawson at gmail.com</A>>

+> wrote:

+>

+> On 10 November 2011 18:18, Dean Macinskas <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">dmacinskas at geobridge.net</A>>

+> wrote:

+> > All blocks need to be 16 bytes. So for example, if the file is 2,000,005

+> > bytes, you'd encrypt 125,000 16-byte blocks; you then have 5 bytes left

+> > over, to which you'd add 11 padding bytes, which can be any binary value

+> and

+> > then encrypt that last block.

+>

+> def _lazysecret(secret, blocksize=32, padding='}'):

+> """pads secret if not legal AES block size (16, 24, 32)"""

+> if not len(secret) in (16, 24, 32):

+> return secret + (blocksize - len(secret)) * padding

+> return secret

+>

+> Python makes it quite easy.

+> The reason I started to use it!

+> Thanks to

+> src <A HREF="http://www.turnkeylinux.org/blog/python-symmetric-encryption">http://www.turnkeylinux.org/blog/python-symmetric-encryption</A>

+>

+> great piece of software.

+>

+> regards

+>

+> --

+> Dave Pawson

+> XSLT XSL-FO FAQ.

+> Docbook FAQ.

+> <A HREF="http://www.dpawson.co.uk">http://www.dpawson.co.uk</A>

+>

+> _______________________________________________

+> pycrypto mailing list

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto</A>

+>

+> Imran Azad

+> Web Content Manager

+> Bradford Teaching Hospitals NHS Foundation Trust

+>

+> Tel: 01274 38 3556

+> Mob: 07535660951

+> Internet: <A HREF="http://www.bradfordhospitals.nhs.uk">http://www.bradfordhospitals.nhs.uk</A>

+>

+> *Your Hospital needs YOU!* We need you to register as a Public, Patient

+> or Staff member and help shape the future of your healthcare. Call 0800 280

+> 2581 to register by phone or you can email

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">bradfordhospitals at capitaregistrars.com</A> and ask to be registered as a new

+> member. For more information about our hospitals and Foundation Trust

+> Membership please visit www.bradfordhospitals.nhs.uk

+> This message is confidential. It may also contain privileged information.

+> The contents of this e-mail and any attachments are intended for the named

+> addressee only. Unless you are the named addressee or authorised to receive

+> the e-mail of the named addressee you may not disclose, use or copy the

+> contents of the e-mail. If you are not the person for whom the message was

+> intended, please notify the sender immediately at Bradford Teaching

+> Hospitals NHS Foundation Trust and delete the material from your computer.

+> You must not use the message for any other purpose, nor disclose its

+> contents to any person other than the intended recipient. Bradford Teaching

+> Hospitals NHS Foundation Trust does not accept responsibility for this

+> message and any views or opinions contained in this e-mail are solely those

+> of the author unless expressly stated otherwise.

+>

+> _______________________________________________

+> pycrypto mailing list

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>

+> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto</A>

+>

+-------------- next part --------------

+An HTML attachment was scrubbed...

+URL: <A HREF="http://lists.dlitz.net/pipermail/pycrypto/attachments/20111111/d48df023/attachment.htm">http://lists.dlitz.net/pipermail/pycrypto/attachments/20111111/d48df023/attachment.htm</A>

+</PRE>

+

+ <HR>

+ <UL>

+

+ <LI>Previous message: <A HREF="000510.html">[pycrypto] Public Key encryption of files

+</A></li>

+ <LI>Next message: <A HREF="000513.html">[pycrypto] Public Key encryption of files

+</A></li>

+ <LI> Messages sorted by:

+ <a href="date.html#512">[ date ]</a>

+ <a href="thread.html#512">[ thread ]</a>

+ <a href="subject.html#512">[ subject ]</a>

+ <a href="author.html#512">[ author ]</a>

+ </LI>

+ </UL>

+<hr>

+<a href="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">More information about the pycrypto

+mailing list</a>

+</body></html>