The Distributed Ledger Technology used by Lethean is called CryptoNote, created by the CryptoNote Foundation; It enables confidential distributed ledgers.
This technology is a battle-tested codebase in production by many projects. The main project many will know is Monero.
Monero is a project that aims to provide “Privacy”; however, this is a misleading sentiment in regards to the code; for that community, it is an apt sentiment, one not shared with Lethean as we are a Confidentiality