**4.1 Smart contracts for clinical trial phase control**

We might chain together unmistakable clinical preliminary stages with the end goal that each step is subject to its ancestor, as well as protecting clinical preliminary stage compilable metadata on the Blockchain. Blockchain innovation, known as Smart Contracts, give devices to these "cutting" and "tying" processes, and can guarantee a degree of straightforwardness, recognizability, and command over clinical preliminary successions.

"Savvy Contracts are PC conventions that straightforwardness, confirm, or implement the exchange of an agreement," as indicated by Wikipedia [17], and their execution might be performed utilizing cryptographic hash chains. Shrewd Contracts, by and by, permit the approval of a stage with the main condition that each first step has been totally checked. For instance, the chain of progressive blocks could check that

#### *Blockchain from a Modern Perspective: An Evolution to Health Science DOI: http://dx.doi.org/10.5772/intechopen.109178*

the planned system was followed, and the material introduced to distributers would incorporate the actual distribution as well as the arrangement of blocks that involve the Smart Contract, the right execution of which demonstrates verification that the review was all around led.

**Figure 4** portrays a Smart Contract as a line of code which holds an automatic official understanding between however many gatherings depending on the situation, without the contribution of a confided in delegate, and that executes algorithmically as per the terms determined by the contracting parties. Brilliant Contracts empower patient incorporation with the sole condition that they have assented, or information examination with the checked and kept up with that the data set is frozen. Every one of the clinical preliminary stages portrayed in the image can be connected together in the succession portrayed, bringing about a more straightforward review and forbidding deduced remaking or information enhancing.
