Create Password Protected Zip containing a Single File.

Create a password-protected .zip containing a single file. (This uses the older Zip 2.0 encryption scheme, which is weaker and not as secure as AES encryption, which Chilkat Zip also supports.)

Download Chilkat Ruby Library

require 'chilkat'

zip = Chilkat::CkZip.new()

#  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print zip.lastErrorText() + "\n"
    exit
end

success = zip.NewZip("test.zip")
if (success != true)
    print zip.lastErrorText() + "\n"
    exit
end

zip.SetPassword("secret")
zip.put_PasswordProtect(true)

saveExtraPath = false
success = zip.AppendOneFileOrDir("c:/temp/hamlet.xml",saveExtraPath)

success = zip.WriteZipAndClose()
if (success != true)
    print zip.lastErrorText() + "\n"
    exit
end

print "Zip Created!" + "\n"