I just checked. This forum is using argon2id Version 19 with a 17 byte salt for password encryption. Argon2 is an award winning encryption, winning it's award in July 2015. It is a one way encryption of course, so it is extremely difficult to decrypt. It does not need to be decrypted because when you log in the password you type is encrypted and that encrypted password is compared with the the encrypted password that was stored when you created your account, if they match then the log in succeeds and you are logged in.
Also know that Delta Fox Design keeps your encrypted passwords stickily confidential (your passwords are ONLY stored in encrypted form). Delta Fox Design operates from a secure server. With any website there is always a chance that a hacker can break in and gain access to encrypted passwords. If this happens we will do our best to notify you as soon as we find out about it.
See: Agron2 - Wikipedia
And see: How to Hash and Verify Passwords With Argon2 in Go - Alex Edwards
phpBB Password Encryption Strangth
phpBB Password Encryption Strangth
Jacob Persico
Owner & Webmaster
Delta Fox Design
Owner & Webmaster
Delta Fox Design