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0
votes
1answer
38 views

Sign a PDF file to verify integrity and validity

I've been asked to distribute electronic certificates (they were originally paper), in a PDF format, but I'd like to sign them with gpg or something similar so users can upload them to my site to ...
5
votes
1answer
41 views

Is there an unencrypted but signed filesystems?

I'm curious if there is a filesystem that's unencrypted, making it readable by anyone, but employs a digital signature scheme so as to require that writes be digitally signed. I suspect the answer ...
0
votes
1answer
588 views

Debian: GPG cannot fetch Linux Kernel key

I am in the process of recompiling the kernel on Debian. Following the instructions on kernel.org, the first step is to verify the signature. But GPG complains that it cannot find the public key: # ...
2
votes
2answers
387 views

How to sign already built Debian package?

I have a project with a custom build-system, so the Debian package is just one of a targets: I do it with dpkg-deb. But now I want to upload my package to some enterprise repo - and I need some files ...
1
vote
0answers
362 views

With opendkim, what might cause “signature doesn't verify” errors with Port25's DKIM email tester?

As far as I know, I've followed all the instructions in this post from Steve Jenkins about how to install and configure opendkim for sendmail under CentOS. ...
2
votes
1answer
136 views

Verifying Debian/Ubuntu packages integrity when booting from a read-only DVD?

Is there an easy way to boot a Debian-based Linux system from a read-only medium (say a Live Linux read-only DVD) and then use Debian's .deb checksums / signatures (?) to verify that the files ...
4
votes
2answers
2k views

Sign a module after kernel compilation

I've built a kernel in tmpfs, then I rebooted. Now I see a message when I compile the 3rd party module, NO SIGN [M] XXXX.ko How can I get it signed? The key pair generated during rpmbuild is lost ...
0
votes
0answers
822 views

Arch Linux steam installation failed due to signature error

I'm trying to install steam on my Arch and pacman said it can't install and showed the following error error: steam: signature from "Daniel Wallace <danielwallace@gtmanfred.com>" is invalid ...
7
votes
1answer
2k views

Cli verification of digitally signed email

I am Alice and I've received signed email from Bob. I use Web e-Mail client (e.g. GMail) and I see that one of attachements is smime.p7s. I've found option "show original message" and saved contents ...
2
votes
0answers
414 views

Getting a digital signature from an eToken/smart card into LibreOffice

I successfully managed to make use of digital signatures in LibreOffice Writer by following flatmtn.com/creating-pkcs12-certificates But now I want to use a digital certificate from an eToken/smart ...
1
vote
1answer
4k views

What means warning: rpmts_HdrFromFdno when installing from rpmfusion?

Installing a media player from rpmfusion (via yum) yields following output: Transaction Summary ================================================================================ Install 3 Packages ...
10
votes
1answer
647 views

Why aren't the Fedora GPG keys signed?

Fedora uses GPG-keys for signing RPM packages and ISO checksum files. They list the keys in use (including fingerprints) on a web page. The web page is delivered via https. For example the checksum ...