Create self-extracting ZIP files optionally with unbreakable AES encryption. Create self-extracting ZIP files optionally with unbreakable AES encryption.The ChilkatZip Self-Extractor can safely encrypt the contents of your ZIP file with 128, 192, or 256-bit AES Encryption. To unzip, a user must provide the same password that was used when creating the self-extracting EXE. AES encryption is much stronger than standard ZIP encryption, which is regarded by security experts as being unsecure.