Before we begin, we have to download and install the Java Cryptography Extension (JCE) provided by Oracle. It consists of two JAR files (local_policy.jar and US_export_policy.jar), which need to override the existing policy files in the JRE lib/security directory.
If the remote property sources stored on the config server contain encrypted data, their values should be prefixed with {cipher} and wrapped in quotes to designate it as a YAML file. Wrapping in quotes is not necessary for .properties files. If such a value cannot be decrypted, it is replaced by an additional value (usually <n/a>) under the same key prefixed with invalid.
In our last sample, we stored the passphrase used for protecting the keystore file ...
