Tagged Questions
1
vote
2answers
63 views
Is it possible to associate a secondary email address with an existing *public* key?
For example, if I have a friend's public key that's associated with, say, email address john@domain.com, but I want to send him a message at john@other.net, is there a sensible way to do this? Is ...
0
votes
1answer
48 views
SSH rejects RSA passphrase for keys created with GPG/Enigmail [duplicate]
Last year I created an 4096 bit RSA key pair with GPG / Enigmail in Thunderbird. Enigmail lists me a primary key used to sign and authenticate e-mails, and a subkey used to encrypt e-mails. I exported ...
3
votes
1answer
425 views
Best encryption and signing algorithm for GnuPG: RSA/RSA or DSA/Elgamal?
I have found this relatively old question about whether RSA or DSA is the preferred algorithm for signing and encrypting with GnuPG.
When using gpg --gen-key, the two relevant choices are either "RSA ...
1
vote
2answers
119 views
Is it possible using symmetric encryption to encrypt a file with two different keys?
GPG/PGP and other public key encryptions allow encrypting to several recipients using their public keys.
Is it possible to use only symmetric encryption to do that same?
In other words is it possible ...
0
votes
1answer
404 views
gpg: import failure key xxxxxxxx: no valid user IDs
i am getting this error while importing a public key on gpg (GnuPG) 1.4.2
gpg: armor header: Version: GnuPG v2.0.14 (GNU/Linux)
gpg: pub xxxxx/xxxxxxxx 2012-05-25 abcd xyz <email@address.com>
...
1
vote
1answer
85 views
Script to verify a signature with GPG
You can feed GPG a file that has been signed and it will spit out a "signature is good" message, and save the plaintext:
[gh403@shillig-arch ~]$ gpg test.gpg
gpg: Signature made Thu Nov 1 14:19:08 ...
1
vote
2answers
208 views
Can you encrypt a hard disk with gpg?
Can you encrypt a hard disk with gpg? Is there any tool to do that?
3
votes
1answer
142 views
How can I use a PGP key on Windows to sign/verify and encrypt/decrypt documents?
Occasionally I need to encrypt a file, cryptographically sign something, etc. GNU PG and PGP are good tools for this, but how can I get them working on Windows? When I try to search for an installer, ...
3
votes
1answer
358 views
Mutt with GPG Password Protection
I got Mutt working with the default IMAP password management configuration with this line in my config:
set imap_pass = XXXX
Which is obviously not secure. I looked at this
...
0
votes
1answer
116 views
In what real-life environments is GPG email signing used? [closed]
I've been using e-mail for over a decade in a regular business environment, but I can not remember having seen any invitation from anybody to GPG sign my e-mails (or somebody who offered to send ...
3
votes
2answers
312 views
if one doesn't care about protecting a gpg secret key, is it still as secure as using gpg --symmetric?
Each of Alice and Bob is using gpg just to protect his/her own personal files and not using it as a way to send encrypted text to others. Alice has generated a key (gpg --gen-key) that she uses to ...
1
vote
1answer
67 views
Can I delete a GPG keyring specified with --keyring while stream is currently being encrypted?
I have a project where I am encrypting a stream like so:
some_command | gpg --keyring tempkeyring.gpg --recipient "person" --output filename.gpg --encrypt
So while the stream is taking place and ...
0
votes
1answer
309 views
Unable to verify encrypted file signature
Using Kleopatra, I have geneated two sets of keys to sign and encrypt a file:
Set A:
Public key : PA
Private Key : PRA
Set B:
Public key : PB
Private Key : PRB
I have used (PA) of Set ...
0
votes
2answers
635 views
Formatting OpenSSL encrypted message, and signature in the same plaintext file
I'm working on designing an API which requires encrypted messages to be signed and sent over TLS. The TLS is HTTP/SSL.
The messages themselves are a few hundred Kb (at most) of JSON data, encrypted ...
7
votes
2answers
1k views
Using ssh key pair to encrypt files
Is it possible to encrypt a text file using a ssh key pair using gnupg?
Where I work we already have our pair created and will be very useful to use these keys to send encrypted files.
Thanks!
1
vote
2answers
277 views
How can I disable prompt about trust when encrypting file with gpg in emacs
I want to use emacs to edit files encrypted with gnu privacy guard. Im using the gpg support built into emacs 23 which I think is easy pg assistant. I import keys created at the command line with M-x ...
7
votes
1answer
863 views
How do I symmetrically encrypt a file using gpg?
I'm trying to symmetrically encrypt a file using gpg.
$ gpg --encrypt --symmetric $MYFILE
I enter and re-enter a passphrase, then gpg tells me
You did not specify a user ID. (you may use "-r")
...
1
vote
1answer
869 views
How does gpg handle multiple keys in a keypair?
As I understand it, keypairs used with gpg generally have more than one associated key: one for signing and one for encryption. How are these multiple keys managed when using gpg (to push to a ...
3
votes
2answers
322 views
Proper use of GPG
I am new to encryption in general and GPG in particular. My use case is storing personal documents on a network drive. These documents are scans (e.g. diplomas, papers). I generated a GPG key using ...
2
votes
1answer
242 views
Encrypt file on FreeBSD
I can't get mcrypt to work on a FreeBSD server ([Bus error 10]). GPG doesn't work, it says it cannot open /dev/tty.
Any ideas?
Also, I kind need to be able to decrypt the file on (Ubuntu) Linux. I ...
3
votes
1answer
141 views
What are the risks of using GnuPG 1.4.9 with the insecure memory message?
I have Cygwin installed on several computers and would like to use the included GnuPG to encrypt files for my use only. The version of GnuPG included is 1.4.9 but it appears that there’s also a ...
1
vote
1answer
346 views
GPG tutorial for beginners
Where can I find a good tutorial on using GPG for the absolute beginner?
Every time I see someone say that you should send public communications using encryption, GPG comes up; where do I start?
0
votes
1answer
242 views
PGP Encryption Proxy for Mail Server
I have a friend who is located in a part of the world that makes email encryption prudent for them. While I recommended OpenPGP, my friend thinks that it would have too high of a setup requirement for ...
0
votes
1answer
119 views
Can I use GnuPG to verify that a file is unmodified and comes from the correct sender?
Can I use GnuPG to verify that a file is unmodified and comes from the correct sender?
Let's take a simple use case:
I have this file with some important content, let's say it is in a .tar.gz file.
...
1
vote
1answer
1k views
How does S/MIME differ from PGP/GPG, for the purpose of signing and/or encrypting email?
In addition to the titular question, are the two technologies compatible? If so, under what circumstances?
What are the relative benefits of the two technologies?
2
votes
0answers
453 views
How to customize Seahorse plugin behavior in Nautilus?
I use Fedora 14. The seahorse-plugins package adds a nifty context menu option in Nautilus that allows you to encrypt/decrypt files easily with your GPG key. But is it possible to customize its ...
1
vote
2answers
704 views
Questions on 'gpg2' security
I have a couple of questions on the security of gpg/gpg2 using symmetric encryption. They are (I imagine) very basic, so apologies if they are documented somewhere. The thing is, I don't know what to ...
6
votes
3answers
412 views
saving and searching encrypted mail
I often send and receive gpg-encrypted mail. At the moment I use thunderbird + enigmail (in linux) to do that. As far as I know there is no way in thunderbird to find all encrypted messages which ...
2
votes
2answers
367 views
Can I add an expiration-date to my existing GPG-key?
I have a GPG-key. This key is unlimited valid. I thought recently, that this isn't the best idea. That's why my question: Can I add an expiration-date to an existant GPG-key? Or is my only option, to ...
4
votes
2answers
177 views
How can I get a new / non-technical user to verify my GnuPG / PGP signed email?
I'm looking for a web front-end or some easy way to get a user who's never been exposed to cryptography / digital signatures etc. to simply copy/paste my GPG signed (not encrypted) email and specify ...
0
votes
1answer
121 views
Timing GPG's Encryption
As part of a college assignment, I must time how long it takes GPG to encrypt a large file. However, I'm not sure how to go about it. A stop watch wouldn't be very accurate!
Thanks.
P.S. By helping ...
1
vote
2answers
1k views
Is there a guide to setting up Mozilla Thunderbird to use my GPG keys to sign and/or encrypt email messages on Windows?
I see instructions on websites and questions here about using GPG keys with Thunderbird in Linux, but nothing on Windows. I have GPG, Kleopatra, and Thunderbird 3 installed on Windows, I made my GPG ...
1
vote
2answers
988 views
gpg symmetric encryption using pipes
I'm trying to generate keys to lock my drive (using DM-Crypt with LUKS) by pulling data from /dev/random and then encrypting that using GPG.
In the guide I'm using, it suggests using the following ...
5
votes
3answers
1k views
Is there an encrypted write-only file system for Linux?
I am searching for an encrypted filesystem for Linux that can be mounted in a write-only mode, by that I mean you should be able to mount it without supplying a password, yet still be able to ...
3
votes
2answers
544 views
Encrypting mail in Evolution with GPG
My settings:
~/.gnupg $ gpg --edit-key 92432433
gpg (GnuPG) 1.4.9; Copyright (C) 2008 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO ...
5
votes
3answers
3k views
Integrate GnuPG with Outlook
I want to integrate GnuPG with Outlook in such a way that when it receives an email, it must automatically decrypt the mail using my private key and display on-screen.
1
vote
1answer
690 views
What is the best PGP program, commercial products included?
What is the best PGP program, commercial products included?
Must have:
Easy and streamlined email integration for common clients.
Easy to encrypt single files with simple GUI.
Some kind of trusted ...
30
votes
1answer
1k views
Short, easy to understand explanation of GPG/PGP for nontechnical people?
Does anyone have a link to a good, but short (1-2 paragraphs) explanation of the benefits of using GPG/PGP signing and encryption for Email focused at non-technical readers? That is, why would someone ...
27
votes
6answers
13k views
What is better for GPG keys - RSA or DSA?
ssh-keygen defaults to creating RSA keys, but gpg --gen-key prefers DSA/ElGamal.
Which one - RSA or DSA - is better for GPG?
