Security concerns

[xNaCly]

Issue:

I have security concerns due to the length of the id of a diary. At the small length of 6 characters it is very easy to brute force.

Screenshots:

Fix:

It should be easily fixable, as its just a matter of implementing the uuid standard.
I will assume i can work on fixing this issue and will put forward a pull request containing a fix shortly.

Credit: @Flam3rboy for raising my awareness of this issue

[Intevel]

Thanks for opening this issue, can you please create your issue in the backend repository?