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Certified Profes­sional for Software Architecture (CPSA®)

The CPSA® Advanced Level Module BLOCKCHAIN – iSAQB® Training Course in Low-Trust Consensus in Decen­tralized Applications


Low-Trust Consensus in Decen­tralized Applications

How do you leverage blockchain technologies to establish consensus in distributed, low-trust systems? Learn how to design decen­tralized architectures.

Credit Points for BLOCKCHAIN Training Courses

Techno­logical Competence


Methodical Compe­tence


Commu­nicative Competence



CPSA Advanced Level module BLOCKCHAIN diagram curriculum content

Content of the module Low-Trust Consensus in Decen­tralized Appli­ca­tions (BLOCKCHAIN)


Blockchain overview and basics


Smart Contracts


Blockchain flavours and their use cases


Permis­sioned blockchain implementations


Archi­tecting blockchain applications


Example of Blockchain Architecture

How to leverage blockchain technologies to establish consensus in distributed, low-trust systems

The umbrella term “blockchain” describes a set of emerging, hetero­ge­neous technologies for designing distributed systems that – while generally assuming little to no trust between parties – are able to establish consensus about stored data and proce­dures. Pioneered as a system to allow transfer of crypto­graph­i­cally secure monetary tokens, blockchains have since evolved to appli­cation platforms for executing smart contracts written in domain-specific languages. While cryptocur­rencies are usually designed to lack a central authority, many indus­trial use cases admit partial cooper­ation between parties.
The central idea common to all blockchain imple­men­ta­tions is that trans­ac­tions can be stored in an append-only ledger that is being kept on multiple nodes, increasing resiliency and decreasing the potential for fraud­ulent post-hoc modifications.

Partic­i­pants of this module will learn to recognize and classify use cases of blockchain technology. They will gain a deep under­standing of the differ­ences and trade-offs between their various flavors (public vs. permis­sioned, Proof-of-Author­i­ty/S­take/Work, smart contracts). Platform requirements and abilities, including languages for smart contracts and their testing and deployment, will be discussed.

The BLOCKCHAIN module focuses on the transfer of software engineering aspects from tradi­tional method­ologies to blockchain technologies. Partic­i­pants will be able to make informed decisions about the tooling choices and be able to design decen­tralized applications.

Related Blog Posts


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iSAQB Blog BLOCKCHAIN interview with curator Lars Hupel

The CPSA Advanced Level is the second step within the iSAQB’s multi-level CPSA program (Certified Profes­sional for Software Architecture). One of the 17 training options of the Advanced Level that partic­i­pants can choose from is the module BLOCKCHAIN – Low-Trust Consensus in Decen­tralized Appli­ca­tions. In this infor­mative interview, Lars Hupel, curator of the Advanced module…

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Advanced Level – Sample task for the CPSA‑A exami­nation task

Sample task “BigSpender” / Topic – Information System

Deutsche Version [pdf]

English Version [pdf]

Curriculum Module BLOCKCHAIN – Low-Trust Consensus in Decen­tralized Applications

Curriculum of the Advanced Level Module BLOCKCHAIN with all learning goals and terms for the individual chapters.

English Version [pdf]

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