in tomee-patch-core/src/main/java/org/apache/tomee/patch/core/Transformation.java [251:258]
private boolean skip(final String name) {
if (name.startsWith("META-INF/")) {
if (name.endsWith(".SF")) return true;
if (name.endsWith(".DSA")) return true;
if (name.endsWith(".RSA")) return true;
}
return false;
}