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collections/web4/finance/proof_of_authenticity.md

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+# Proof of Authenticity
+
+Proof of Authenticity (PoA) is an algorithm that allows peers to verify that people, products and statements on the ThreeFold Grid are genuine. It acts as a reputation engine to validate any information on the grid. 
+
+## Why Proof of Authenticity
+
+Any system that contains a vast amount of information, should require proof of authenticity.
+
+We believe users should be able to measure authenticity in relation to
+
+- The people they connect with;
+- The products and services they access;
+- The information they consume.
+
+Therefore, to automate information search in a decentralized and trustful environemnt, an algorithm that is able to scale information verification in a neutral way is required. 
+
+Proof of authenticity puts forward a very simple method to verify the genuiness of information.
+
+Here's an example of how PoA works in a decentralized context:
+
+- Someone fills in their profile with their personal and professional data. 
+- A former colleague finds their information and verifies their information as being authentic. 
+- Once a user gets verified e.g. 10 times, they can be trusted to be real and genuine. 
+
+The above can also apply to products, statements and more. In that sense, PoA can solve multiple digital challenges such as:
+
+- The verifiability of information and news 
+- A non-biased way to rate products and services. 
+- website authenticity 
+- etc.
+
+## Applicability
+
+POA can be used for any type of information but one of the first ones is identity, KYC/AML is a mechanism to identify people but peer authentication is a very powerful way to extend this with.
+
+