Secret Space could be considered as an encryption tool, as it allows you to hide short messages invisibly in much longer texts. This is done by subtly inserting superfluous spaces between words, making it a very interesting security tool.
The operation of Secret Space is as follows: you write a fairly long text in the program editor; once finished, you save it; and then you add a short phrase that you want to hide. Logically, the longer that phrase is, the greater the original text will have to be.
So that you can see the saved message again, you just have to execute Secret Space again, copy and paste the original paragraph, and it will show you the hidden text that remains inside. Secret Space is totally free.
You can free download Secret Space and safe install the latest trial or new full version for Windows 10 (x32, 64 bit, 86) from the official site.
Devices: Desktop PC, Laptop (ASUS, HP, DELL, Acer, Lenovo, MSI), Ultrabook
OS: Professional, Enterprise, Education, Home Edition, versions: 1507, 1511, 1607, 1703, 1709, 1803, 1809