Chilkat Zip Self-Extractor Version 8 descriptions 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.