What happens when a root CA has its private key compromised? Then all children in the tree are compromised too? And then all certificates are compromised? What needs to happen then? Related: - How ...
How does certificate revocation list (CRL) work? How can I send a request to the CA to add my current private key to the CRL, so no one except me can add my certificate to the CRL? Related: - How can ...
To get a public key of some organization or someone we want to send an encrypted message to, we need to make a request to CA asking that organization's public key. CA then returns X509 certificate. It ...
A Web Application wants the user to digitally sign a transaction using a PKI certificate. All users are pre-registered with the web-application. Pre-registeration includes uploading the Public part of ...
I have a string "abcd pqrs". This string is digitally signed with an X.509 certificate (with its private key) and it produces a signature. From the signed string, is it possible to find out what ...
I am working on application that allows users to upload files containing company data and then share those files with a list of other users that have specific roles within the system. I want to ...