There are many alternatives to Kleopatra for Linux if you are looking for a replacement. The best Linux alternative is GnuPG, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Kleopatra and seven of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Kleopatra are AES Crypt, Lock GnuPG, Seahorse and GoAnywhere OpenPGP Studio.
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
Easily encrypt files with user-friendly software using the powerful AES standard for security on Windows, macOS, and Linux, featuring robust 256-bit encryption for safeguarding sensitive data from unauthorized access, ideal for secure data storage, email transmission, and internet uploads.
Seahorse is a GNOME application for managing encryption keys and passwords in the GNOME Keyring.
Both are able to deal with PGP certs & keys. Could not find if / where Seahorse handled importing X509 certs
GoAnywhere OpenPGP Studio™ is a free desktop tool that makes it easy to protect sensitive files using the popular OpenPGP encryption standard. Documents can be encrypted, decrypted, signed and verified from your PC or workstation using this...
Does not handle x509 certificates; therefore only does half (1/2) of what Kleopatra does.
DCrypt is an encryption and decryption tool that combines in a smart way multiple algorithms. The combination of multiple strong algorithms makes it much more difficult for hackers to get the plain content of the encrypted file without the password.
OneTime is an open source encryption program that uses the one-time pad algorithm to allow two parties to communicate privately. It has features to assist with the bureaucracy of pad management, and comes with built-in help. OneTime requires Python 2.
While both support encryption and thereby privacy, OneTime does not manage certificates or keys used for encryption. Therefore this is not a meaningful alternative to Kleopatra. That said, is can be a good form of secure one-time communication.
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AES Crypt (uses AES encryption) works in a different way than Kleopatra (using OpenPGP) does.