in src/main/java/org/apache/maven/plugins/gpg/BcSigner.java [369:375]
public String getKeyInfo() {
Iterator<String> userIds = secretKey.getPublicKey().getUserIDs();
if (userIds.hasNext()) {
return userIds.next();
}
return Hex.toHexString(secretKey.getPublicKey().getFingerprint());
}