How to create a virtual encrypted disk?

Question

Encryption

Good
afternoon Tell me how to create a virtual encrypted disk?
Everything is planned to be synchronized to the cloud
Yes, I know that there are ready-made programs, but a slightly different principle is needed, and a combine is not really needed.
That is, a program is needed as simple as possible (in terms of load)
The principle of operation is
There is a folder, for example C:\ Cloud
We start it in the program, a virtual disk is created, for example S:\
When accessing S:, files are transparently encrypted and this is done on the fly, and not by creating a separate encrypted copy of C:\Cloud somewhere on the disk
. For example, if there is a C :\Cloud\123.txt then S:\123.txt is an encrypted copy of the file (moreover, it is encrypted in memory, nothing needs to be stored on disk)
Well, the reverse functionality, we specify a folder with encrypted files, a virtual disk is mounted and the files are decrypted on this disk, again in memory. You don’t need to rush to decrypt everything at once.
I hope I described everything accurately
. Thank you very much for the hint, it’s just that the whole Google climbed (maybe badly)
I found only one ideal solution that I would like to see in the end - encf4win with the reverse key, but there the level of encryption is not quite ice already

Answer 1

It seems to me that without drivers it will not work ...

Answer 2

Apart from encf4, there is nothing else that is good, except for shells that use it. For example, boxcryptor, but it is paid and closed. But there encf4 is filed and better with encryption.