Re: Encryption Algorithm for GnuPG?

2019-05-27 Thread gnupg
Procopius via Gnupg-users wrote:

> What is the encryption engine for the current GnuPG. I read that it
> isNIST AES. I know IDEA is proprietary so that can’t be used, is this
> correct?
> 
> If it’s NIST AES that is under the US Government? Wouldn’t that be in
> danger of a US back door in the algorithm?
> 
> Elwin

NIST didn't create AES. They selected a subset of an existing block cipher,
Rijndael, for use by the US government to replace the previous standard, DES.

https://en.wikipedia.org/wiki/Advanced_Encryption_Standard


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Re: I've been hacked and now I only use a key pair on keybase.

2019-05-27 Thread Stefan Claas
Andrew Gallagher wrote:

> For the last four years or so, I have maintained my PGP primary key
> on a Tails[0] thumb drive, and my subkeys on a redundant pair of
> OpenPGP smartcards. This gives me:
> 
> a) offline storage of my master key
> b) secure backup of all key material
> c) convenient access using any of my existing machines
> 
> I started developing a tool[1] to simplify the management of the
> offline primary key on the Tails drive, but development has stalled.
> If there is genuine interest out there, I will dedicate some more
> time to it.
> 
> [0] https://tails.boum.org
> [1] https://github.com/andrewgdotcom/frith
> 

Thanks for outlining your procedure!

I will give tails a try soon, but not for PGP usage.

I will go for my procedure, involving an offline Notebook
and a second key (which I have now on keybase).

This will give users the option, when communicating with
me, that they either can choose my keybase key, which I
think is a good idea from keybase, because it would allow
IMHO people to travel to the U.S. without carrying a secret
key with them, in case border patrol checks computers etc.
and my offline key for "important" stuff, which then will
be also used to sign all outgoing messages, regardless
which key is used.

I think it is a good procedure and in case stuff like
tempest attacks etc. would came into play then it is
game over, for a normal EU citizen like me. But at
least it should keep hackers away from my GnuPG and
box encrypted communications.

Regards
Stefan

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Re: Encryption Algorithm for GnuPG?

2019-05-27 Thread Michał Górny
On Sun, 2019-05-26 at 23:30 -0700, Procopius via Gnupg-users wrote:
> If it’s NIST AES that is under the US Government? Wouldn’t that be in danger 
> of a US back door in the algorithm?
> 

Why would them bother trying to split a backdoor in the algorithm
unnoticed if it's much simpler to install it in the hardware and go
straight for the unencrypted data?  In fact, I'm pretty sure they would
actually encourage you to use strong encryption just to let your guard
down!

-- 
Best regards,
Michał Górny



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Re: Encryption Algorithm for GnuPG?

2019-05-27 Thread Damien Goutte-Gattat via Gnupg-users

On Sun, May 26, 2019 at 11:30:18PM -0700, Procopius via Gnupg-users wrote:

What is the encryption engine for the current GnuPG.


There’s no single symmetric encryption algorithm. OpenPGP allows a set 
of algorithms: 3DES, IDEA, CAST5, AES, Blowfish, Twofish, and Camellia 
[1,2]. GnuPG supports all of them.




I know IDEA is proprietary so that can’t be used, is this correct?


All patents on IDEA have now expired and IDEA is supported by GnuPG.


If it’s NIST AES that is under the US Government? Wouldn’t that be in 
danger of a US back door in the algorithm?


Rijndael was actually designed by a team of Belgian cryptologists. NIST 
evaluated it amongst the other candidate ciphers of the AES competition 
and eventually selected it as the winner, but was not involved in its 
design. [3]



- Damien

[1] https://tools.ietf.org/html/rfc4880#section-9.2

[2] 
https://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13


[3] 
https://www.nist.gov/news-events/news/2000/10/commerce-department-announces-winner-global-information-security


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Re: I've been hacked and now I only use a key pair on keybase.

2019-05-27 Thread Andrew Gallagher
On 26/05/2019 15:42, Stefan Claas wrote:
> murphy wrote:
> 
> Hi murphy,
> 
>>> ...until I have the funds to
>>> buy me a new *offline* usage Notebook.
>>
>> Hi Stefan - I don't know your use model but you can't beat a $5 USD
>> Rapsberry Pi Zero V1.3 for a cheap offline platform that can compile
>> and use GnuPG 2.2.15. murphy
>>
> 
> Thanks for the info, good idea! For certain tasks I would
> however prefer a small Notebook.
For the last four years or so, I have maintained my PGP primary key on a
Tails[0] thumb drive, and my subkeys on a redundant pair of OpenPGP
smartcards. This gives me:

a) offline storage of my master key
b) secure backup of all key material
c) convenient access using any of my existing machines

I started developing a tool[1] to simplify the management of the offline
primary key on the Tails drive, but development has stalled. If there is
genuine interest out there, I will dedicate some more time to it.

[0] https://tails.boum.org
[1] https://github.com/andrewgdotcom/frith

-- 
Andrew Gallagher



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Encryption Algorithm for GnuPG?

2019-05-27 Thread Procopius via Gnupg-users
What is the encryption engine for the current GnuPG. I read that it isNIST AES. 
I know IDEA is proprietary so that can’t be used, is this correct?

If it’s NIST AES that is under the US Government? Wouldn’t that be in danger of 
a US back door in the algorithm?

Elwin

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