What programs exist for encrypting files without signatures under Win?

Question

Encryption

Good day. What are the programs under Windows for encrypting files that do not leave signatures? (and in general, any distinctive features by which you can unambiguously judge that this file is encrypted)

Answer 1

and in general, any distinctive features by which you can unambiguously judge that this file is encrypted

These don't happen.
The content of an encrypted file without knowing the encryption key does not carry any semantic load - just noise.
According to this parameter, it differs from unencrypted, this is the main distinguishing feature.
Therefore, nothing will work.
You can hide encrypted information in other files, such as photos or videos, but this is no longer related to file encryption.