Replying to @light@noc.social
GNUnet has a "fs" module designed pretty much like Freenet, except it's open source so easier to audit. With some nice Sybil resistance in the R5RS paper. Except it y'know, needs a lot of work. And you said your forum would be centralized, so you could just put it on an I2P "eepsite" and be pretty secure.
I honestly haven't been involved in any of that since like 2018 when java I2P went closed source, so my information might be dated. I still run I2PD at times, though the developers speak Russian so it's hard to participate.
docs.gnunet.orgFile-sharing — GNUnet documentationI honestly haven't been involved in any of that since like 2018 when java I2P went closed source, so my information might be dated. I still run I2PD at times, though the developers speak Russian so it's hard to participate.