Building trust is much more necessary in electronic business than in paper trades: frauds are massive and immediate, and users often less mistrustful. Protecting clients and suppliers from identities usurpations, stating certain anteriority between events, preventing document's modification without its owner' knowing, and preventing confidential information divulgation require to use trust infrastructures made of consequent and elaborated material, human or logical means. Certinomis operates its own trust infrastructures and take care to maintain them permanently conform to the state of the art on technical and juridical consideration as well, and always seek to obtain most demanding qualification and referencing. They are used to produce a range of services that allow peoples and organisations to protect and value their immaterial transactions: authenticating, signing, sealing, time stamping and enciphering are performed electronically by using Certinomis' trust services. Clients of Certinomis as a Digital Trust Operator benefit from high value solution at best cost, that allows them to combine trust and dematerialisation.