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Questions tagged [signature]

26 questions
35
votes
11 answers

How can I sign a PDF document quickly and cheaply?

I need to sign a PDF document. However, Adobe Reader does not let me sign documents. I just need to sign the document, not edit it. Do I need to buy the full Acrobat software? Or is there a better, simpler way?
user35981
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17
votes
2 answers

What happens if a signature of a program expires?

Can the program still be installed after the expiration date of the signature? Or does it have to be signed again?
Michael S.
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8
votes
2 answers

“The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059”

I try to update Debian but I get the following error message: % sudo aptitude update Hit http://deb.debian.org/debian bullseye InRelease Hit http://deb.debian.org/debian-security bullseye-security InRelease Hit http://deb.debian.org/debian…
fauve
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8
votes
1 answer

Generating JWT RS256 signature with openssl

I'm trying to sign a JWT token with the RS256 algorithm using openssl. Take the following example token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ Per RFC 7518, RS256 means the…
fstanis
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2
votes
0 answers

Thunderbird Signature Switch - Sync signatures between different devices

When composing a message in Thunderbird I would like to easily turn on/off and choose between signatures but also sync my signatures between different devices. So far the Signature Switch add-on in Thunderbird was perfect for the job. I could save…
woodstock
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2
votes
1 answer

Provide download repository with signed DEB-packages?

I provide an own download repository for Ubuntu DEB-packages. It comes with a directory structure in style https://mydomain.tld/download/Ubuntu/dists/bionic/main/binary-amd64/ The directory contains the DEB-archives as well as the Packages.gz which…
Elmi
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1
vote
1 answer

About the security of adding a signature to a PDF file

We can add a "bitmap" or image signature to a PDF file, either by using Adobe Acrobat or by Mac's Preview app, but I wonder, besides always encrypting it with a password before sending it by email to the other party, how valid and secure is it? The…
nonopolarity
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1
vote
1 answer

Why am I not able to independently verify that a developers personal key has been signed by a master key?

It says here that there are 5 Master signing keys for the Arch Linux project. It also says that active, trusted developers have their keys signed by one or more of the master keys. And we can see that Pierre Schmitz's personal key is signed by…
bluesquare
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1
vote
0 answers

Openssl DSA Signature Verification Failure Error not understood

I am given a public key in PEM format: -----BEGIN PUBLIC…
abdul rahman taleb
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1
vote
0 answers

Disable Digital Signature Certification or issue a blanket certificate for all users on an InfoPath form?

We have some Time-Off request forms that are sent through InfoPath 2007 via e-mail and it goes down the verification line (e.g. Employee signs and it gets sent to their supervisor then it gets sent to HR for final sign off). The problem we're having…
user11294984
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1
vote
1 answer

Trying to verify a download signature with PGP, but getting "no signed data" when passing in the .asc file?

I tried the following steps from Verifying Signatures on the Tor Project: gpg.exe --keyserver pool.sks-keyservers.net --recv-keys 0x4E2C6E8793298290 imported: 1 gpg.exe --fingerprint 0x4E2C6E8793298290 pub 4096R/93298290 2014-12-15 [expires:…
Dr-Bracket
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0
votes
0 answers

can't verify signature error occuring while updating my office 365

while trying to update my pc with office 365 .can't verify signature message is popping up. i tried uninstalling and installing the software .After performing sfc scan KB63363901 .that problem was solved. Is this the parmanent solution .
krisvan 2112
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0
votes
0 answers

Renew a self-signed certificate

Let's say I have a self-signed X.509 certificate: file some.bin some.bin: Certificate, Version=3, Serial=00ea5db390c4cc0de3, Issuer=Some Certificate, not-valid-before=2022-08-02 06:51:44 GMT, not-valid-after=2042-07-28 06:51:44 GMT, Subject=Some…
JohnnyFromBF
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0
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1 answer

Signature in Front is getting resized in Outlook

I am trying to create a signature in front. I was able to insert the image by saving it on the computer and uploading it. After messing around with the formatting it looks fine on Front. The problem arises when sending an email and opening it up on…
Collin Collin
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0
votes
1 answer

How reliable is Window's verified publisher system?

I assume anyone can with some effort add their certificate under name X to their database, in that case, is there anything stopping a fake publisher from adding themselves with the name of a legit publisher and the signature saying it's from legit…
Hormoz
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