Block-chain technology is gaining momentum in both industry and academics. With
this momentum there are a lot of potential gains, but also potential risk involved. This papers proposes a solution for security risks, like a man-in-the-middle-attack, of the permissioned block-chain distributed ledger software Hyperledger Fabric. A prototype is introduces that uses the Trusted Hardware Module for attestation. By combining the key hierarchy present in the TPM, to sign assets before storing them on the ledger.