Author of the tool here.
While I'm no cryptographic expert, the idea for this tool was stuck in my head for years and as most of you will probably agree the best way to learn something new is diving straight into the topic - learning by doing ftw.
I also wrote a short article containing my idea's and the concept for the tool on my blog : https://blog.laughingman.dev/article/TachiCrypt_a_experiment...
On why i post it on hackernews:
1. I like to share - and also show people that its worth diving into new topics to learn and enhance your skills
2. I'm happy about every possible feedback
Thanks in advance and if i can motivate someone else to give an idea that was stack in that persons head a try and not be scared of by a "to complex topic" - it was worth it already.