Bouncer Shield filters out invalid emails, protects form security, and ensures data的真实性有效。 It seems there is a part missing or incorrectly formatted in the original text. The phrase "确保数据真实有效" was not properly translated due to an issue with the input. Assuming the intended meaning is to ensure data真实性有效, the correct translation should be "ensures data真实性有效性". However, for clarity and natural English flow, it would be best to translate this as "ensures data的真实性 and effectiveness". A more coherent translation would be:"Bouncer Shield filters out invalid emails, protects form security, and ensures data的真实性 and effectiveness." If "真实性有效" was meant to be part of a product name or specific term that should not be translated, please clarify.