How to encrypt a file so it won't open?

Question

PHP

I need to encrypt a file (more precisely .jpeg) so that it doesn't open anywhere at all.

Answer 1

Encrypt with any method available to you, since after encryption it will not open in any case as a picture

Answer 2

https://www.php.net/manual/ru/function.openssl-seal
https://www.php.net/manual/ru/function.openssl-enc...

Answer 3

The jpeg won't open if you change the first few bytes in the header, even just one.
And if you change even more bytes, then it will be better

Answer 4

winrar with password 16+ characters.

Answer 5

I once rewrote the image file back to front on delphi7)