Install softhsm by entering the following commands in the terminal:
sudo apt update sudo apt install softhsm
Description:
cryptographic store accessible through a PKCS #11 (dummy)
SoftHSM 2 is a software implementation of a generic cryptographic device with a PKCS #11 Cryptographic Token Interface. . This is a transitional package and can be safely removed.
Homepage: https://www.opendnssec.org/softhsm/
Version: 2.2.0-3.1build1
Section: universe/oldlibs