All Questions
Tagged with openpgp encryption
30
questions
8
votes
1
answer
3k
views
How to use GnuPG to get the smallest possible output (symmetric encryption)?
I'm trying to produce very small OpenPGP-encrypted files that can be embedded into QR codes.
However, in comparison to for example OpenSSL, GnuPG seems to produce very large results for a simple ...
- 183
5
votes
3
answers
2k
views
How does public/private key cryptography work, who generates the key pair?
I have a requirement to encrypt a file, get it to an external partner who will then decrypt the file using a key.
My "basic" understanding is that I can generate the public and private keys, encode ...
- 203
4
votes
3
answers
1k
views
Handling and security of GnuPG private key
I am new GnuPG, thus, this might be a silly question. Yet:
I want to encrypt my emails, thus using gpg4win. Alongside I use Kleopatra, a tool for creating my own certificates and managing the public ...
- 53
3
votes
1
answer
2k
views
Why does PostgreSQL's pgp_sym_encrypt return different output although invoked for the same input?
I am getting different results while executing PostgreSQL's pgp_sym_encrypt command with same plaintext and passphrase as input. When decrypting those different results with the same passphrase, I get ...
- 151
3
votes
1
answer
95
views
Should my OpenPGP key used for storing documents in the cloud expire?
I plan on doing a mass migration of all my local files to various cloud services since space is pretty cheap these days.
I figure I should probably encrypt my data before I upload it, which is better ...
3
votes
1
answer
543
views
GPG subkey seems to have different password
I have recently created a new OpenGPG key with Thunderbird and exported it to use it with gpg. However, I cannot decrypt anything outside Thunderbird because my subkey - which is used for encryption - ...
- 33
2
votes
1
answer
1k
views
Are OpenPGP-encrypted files vulnerable to data corruption?
I have used GnuPG to encrypt some long-term backups, but I am concerned whether over time data corruption might make it impossible to recover the archives.
Can you decrypt partially corrupted OpenPGP ...
- 77
2
votes
1
answer
4k
views
How to encrypt and sign a file using OpenPGP on Mac
I fear I may have sent a message without encryption when I thought it was being encrypted and signed. I don't use OpenPGP on a Mac too often (I can't remember the last time), so I'm trying to ...
- 12.3k
2
votes
1
answer
3k
views
How to convert gpg4win's binary to ascii, with Notepad++
I can reliably convert gpg4win's ascii to binary using Notepad++ option "Base64 Decode" (credit: James K Polk). Works every time.
But when I attempt the reverse, i.e. convert binary to ascii, it ...
- 115
2
votes
1
answer
3k
views
Is GnuPG symmetric encryption vulnerable to brute force attacks on the passphrase?
The handbook suggests that symmetric encryption is appropriate (and therefore not less secure than public key encryption?) when only you need to access the plaintext. But according to this post, ...
- 23
2
votes
0
answers
3k
views
Convert GPG private key to QR code?
How can I generate a QR code from a OpenPGP/GnuPG private key on Windows 7?
Context:
I created a private key pair on a Windows computer and want to import the key to my phone. The phone app has ...
- 115
1
vote
1
answer
4k
views
How to query for all recipient OpenPGP keys with GnuPG?
I cannot find a reliable method for asking gpg the list of (public) keys used to encrypt a given file. One plausible solution doesn't work for me -- it never lists my key:
gpg --list-only --no-...
- 3,496
1
vote
1
answer
11k
views
GPG2 Encryption - No public key error
When I generate my keys using
gpg2 --gen-key
and then I try to try to encrypt the file using
gpg2 --batch --yes -r [email protected] --always-trust --homedir . -e test.text
I get an error "...
- 203
1
vote
2
answers
787
views
GnuPG: Add passphrase to passphrase-less key
I've created my PGP keypair using an online site.
The thing is, I didn't provide a passphrase upon creation; The site didn't make supplying a passphrase mandatory.
Since this key is passphraseless, ...
1
vote
1
answer
300
views
Do I need a PGP key?
I've recently got familiar with the concept of OpenPGP public-private keys, and how to use GnuPG tool to manage PGP keys. I have three questions:
1- Is it necessary for me to have a PGP (or an ...
