As I understood your post, your distinction between linkability and traceability was that the former links separate transactions and the latter links parts of a single transaction as it moves through one or more systems.

Stefan says that traceability is the ability to determine the user’s identity based on analysis of his claims.

Perhaps what accounts for the difference is that you wrote about traceability of transactions whereas he wrote about traceability of claims, but I think that for the sake of the coherency of the conversation, it would help a lot to have a clear, consistent definition of the term.

“Being able to follow a transaction through all its phases by collecting transaction information and having some way of identifying the transaction payload as it moves through the system” doesn’t necessarily mean that I can also identify the person who originated the transaction. I might want the first kind of traceability while not wanting the second. Can we have separate terms, please?