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Adam Back

Cryptographer who invented Hashcash, the proof-of-work system cited in the Bitcoin white paper, and later co-founded Blockstream.

Adam Back is a specific People coordinate in the Bitcoin knowledge graph. In practical terms, it identifies the subject described here: Cryptographer who invented Hashcash, the proof-of-work system cited in the Bitcoin white paper, and later co-founded Blockstream. This definition is narrower than promotional usage and should be read together with the implementation, date and evidence attached to the entry.

Cryptographer who invented Hashcash, the proof-of-work system cited in the Bitcoin white paper, and later co-founded Blockstream. The linked coordinates show the person's projects, ideas, disputes and historical effects.

Primary or authoritative records make these details checkable: Cryptographer who invented Hashcash, the proof-of-work system cited in the Bitcoin white paper, and later co-founded Blockstream. · Influence is not endorsement · Claims are linked to source data · Related entries show projects and disputes. They should be verified before using the coordinate in analysis.

The practical limit is: Cryptographer who invented Hashcash, the proof-of-work system cited in the Bitcoin white paper, and later co-founded Blockstream. · People do not control Bitcoin consensus. A definition, office, chart pattern or published claim is not by itself a prediction or Bitcoin consensus rule.

For the clearest picture, read this entry together with Hashcash, Proof of Work, Sidechain, Bitcoin. The reverse links also lead from Hashcash.

DOC · 001Adam Back — personal site and HashcashPrimaryDOC · 002Adam Back — Hashcash paperPrimaryDOC · 003Bitcoin whitepaperPrimary
Reviewed 1 August 2026Source-first · No investment advice