# kaal:claim:3931933-016

**Claim.** Uptime based reward policies invite Sybil style abuse: on the original Casper testnet single persons ran fifteen or more validator nodes to exploit cloud provider promotions and the DEVxDAO rewards policy, extracting rewards without contributing to the validator group.

**Type.** failure  **Support.** evidenced

**Holds when.**

- original Casper testnet under a uptime only rewards policy

**Source quote.**

> The original Casper Testnet was also afflicted by cases of single persons running 15+ validator nodes in an effort to abuse the welcome promotions of certain cloud providers and the rewards policy of the DEVxDAO.

**From.** Wulf A. Kaal, *Hybrid Secure Proof of Stake* (2021), Testnets as remedies to platform centralization, page 5

**Cite as.** Wulf A. Kaal, Hybrid Secure Proof of Stake (2021). SSRN: https://ssrn.com/abstract=3931933

**Verify.** sha256 of source PDF `55a71cdfceb96fadefba1f2fed9563b588825378c91aff644ee7faaccdf31204` at https://raw.githubusercontent.com/wulfkaal/Academic-Papers/main/papers/pdf/Kaal%20-%202021%20-%20Hybrid%20Secure%20Proof%20of%20Stake.pdf

**Failure mode.** multi node reward farming  (family: sybil-and-identity-attack)

**Topics.** consensus-and-security, regulatory-failure, risk-and-incentives

**Keywords.** casper-network, sybil-attack, reward-gaming, multiple-nodes, incentive-design

**Canonical form.** This markdown file is the canonical hashed representation of the claim. Its sha256 is the content hash used for attestation.