> For the complete documentation index, see [llms.txt](https://docs.ternoa.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ternoa.network/learn/ternoa-fortress.md). # Ternoa Fortress Ternoa Fortress is the first-of-a-kind flexible decentralized infrastructure that can host any confidential computing application. [Ternoa Fortress](https://medium.com/ternoa/ternoas-fortress-1dafe026f938) infrastructure co-evolved with the Ternoa [Secret-NFT](https://medium.com/ternoa/the-launch-of-ternoa-phase-4-part-i-secret-nft-c2c09a07eaa7) solution. Fortress is an off-chain and chain-agnostic decentralized protocol based on the Trusted Execution Environment (TEE) technology while Secret-NFT is a radical approach for adding confidentiality to regular NFTs respecting transferability and transparent flexible ownership. Secret-NFT technology at its core is a Decentralized Key Management System ([DKMS](https://docs.ternoa.network/learn/ternoa-fortress/key-management)) where in Ternoa it is backed by tens of cryptographic layers called Fortress. In this article, we explain the design decisions and implementation details of these two products.

Figure 1: Core components of Ternoa Blockchain

For a Decentralized Key Management System, Fortress in addition to expected security, the confidentiality of storage/retrieval of keys without any central authority or master key, provides a set of unique management features like Asynchronous Noninteractive Key Transfer, Interoperability between applications, and Resilience.