in sdk1/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/AttributeEncryptor.java [227:236]
private boolean shouldEncryptAttribute(
final Class<?> clazz,
final Mapping mapping,
final StandardAnnotationMaps.FieldMap<?> fieldMap) {
return !(doNotEncrypt(clazz)
|| doNotEncrypt(fieldMap)
|| mapping.isPrimaryKey()
|| mapping.isVersion());
}