Maven build:

mvn package

Should retrieve jasypt libraries using Maven and
create target/ips.security-x.y.z.jar

Installation:

Copy Jar files icu4j.jar jasypt.jar and ips.security-x.y.z.jar
to Tomcat lib/ folder (~tomcat8/lib on Ubuntu 18.04).

(It is not sufficient to put them in the classpath of the webapp folder.)

Configuration:

See JAASRealm Tomcat docu for configuration.
