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the-appchain-thesis-cosmos-and-polkadot
Blog

Why Shared Security Models Inevitably Centralize Economic Power

An analysis of how Cosmos Hub's Interchain Security and Polkadot's shared security create systemic centralization, turning security providers into gatekeepers and replicating L1 validator problems at the ecosystem level.

introduction
THE CENTRALIZATION TRAP

The Security Rentier State

Shared security models, from Ethereum's L2s to Cosmos's Interchain Security, inevitably consolidate economic power and control into a single rent-extracting entity.

Security is a natural monopoly. The most secure chain attracts the most value, which funds its security budget, creating a self-reinforcing loop that competitors cannot break without massive, coordinated capital. This is why Ethereum's dominance persists despite higher fees.

Rollups centralize to L1. While L2s like Arbitrum and Optimism offer cheaper execution, their security and liveness are wholly dependent on Ethereum. This makes them economic vassal states, paying continuous rent (gas fees, sequencing revenue) to the L1 sovereign.

Interchain Security centralizes to hubs. Cosmos's ICS allows chains to lease security from the Cosmos Hub's ATOM stakers. This creates a single point of economic capture, where the hub's validators extract fees from all consumer chains, replicating the L1/L2 dynamic.

The rent is the protocol's revenue. This model transforms security from a public good into a recurring revenue stream. The security provider's token accrues value not from utility, but from its position as a mandatory toll gate for all economic activity.

Evidence: Over $30B in TVL is secured by Ethereum for L2s, generating billions in annual sequencer revenue and gas fees that flow directly to ETH stakers and burn.

deep-dive
THE INCENTIVE FLOW

The Mechanics of Capture: From Validators to Gatekeepers

Shared security models concentrate economic power by design, transforming validators into centralized gatekeepers.

Shared security is a misnomer. It describes a rental model where sovereign chains pay a fee to a host chain's validators for block production. This creates a direct economic dependency that the host chain exploits.

Validators become the bottleneck. The host chain's validator set, like Cosmos Hub's Interchain Security providers, controls the canonical state for all consumer chains. This centralizes transaction ordering and MEV extraction at the source.

The gateway controls the network. Projects like Celestia and EigenLayer abstract this into data availability and restaking, but the gatekeeper role remains. Validators decide which rollups or AVSs get prioritized service.

Evidence: In Cosmos ICS, the ATOM token captures fees from all consumer chains, creating a fee siphon to the hub's stakers. This is not security sharing; it's tribute extraction.

SHARED SECURITY MODELS

Centralization Metrics: Cosmos Hub vs. Polkadot

A quantitative comparison of how Interchain Security (ICS) and Parachain Auctions structurally centralize economic and governance power.

Centralization VectorCosmos Hub (Interchain Security)Polkadot (Parachain Auctions)

Security Provider

Cosmos Hub Validator Set

Polkadot Relay Chain Validator Set

Consumer Chain Bonding Requirement

2/3 ATOM Stake Must Approve

Winning Parachain Slot Auction

Avg. Validator Set Overlap (vs. Provider)

100%

100%

Economic Sink

ATOM Staking Rewards & Fees

DOT Locked in Crowdloans / Treasury

Provider Chain Fee Capture

100% of Consumer Chain Fees

0% of Parachain Fees

Sovereignty Trade-off

Relinquishes Sovereignty for Security

Relinquishes Liquidity for Security

Minimum Viable Capital (Est.)

Governance Proposal Only

~100,000 - 1M+ DOT Locked

Provider Chain Governance Power Over Consumer

Can unilaterally slash, halt, or upgrade

Can veto parachain upgrade via Root

counter-argument
THE CENTRALIZATION TRAP

The Rebuttal: Isn't This Just Efficient?

Shared security models optimize for capital efficiency at the cost of consolidating systemic power.

Efficiency centralizes power. Shared security models like EigenLayer and Babylon create a single, dominant market for pooled capital. This centralizes the supply side of security, creating a systemic dependency on a few large staking pools.

Validators become universal. A validator securing Ethereum can simultaneously secure a Cosmos app-chain and an Avail data availability layer. This creates a single point of failure across disparate ecosystems, contradicting modular design's isolation goals.

Economic gravity is inescapable. Capital flows to the highest yield, consolidating in the most efficient pooled service. This replicates the Lido problem at the infrastructure layer, where a few entities control the security of hundreds of chains.

Evidence: Over 60% of Ethereum's beacon chain exits are now attributable to just five entities. Shared security amplifies this concentration, making the cost of corruption a function of one market's liquidity, not many.

case-study
THE VALIDATOR CONCENTRATION CURVE

Case Studies in Centralization Pressure

Shared security models, from PoS to restaking, create economic gravity that inevitably pulls power to a few dominant players.

01

Ethereum's Liquid Staking Oligopoly

Lido's ~30% market share creates systemic risk, demonstrating how pooled staking centralizes validator control. The protocol's DAO governance is dominated by a few whales, making it a de facto central point of failure.

  • Key Problem: Staking-as-a-Service concentrates ~70% of all staked ETH in the top 5 providers.
  • Key Consequence: The "Lido dominance" debate highlights the impossibility of credibly neutral, decentralized staking at scale.
~30%
Lido Share
>70%
Top 5 Providers
02

Cosmos Hub's Failed Replication

The Interchain Security model, where the Cosmos Hub secures consumer chains, centralizes economic value and decision-making in the ATOM token. This creates a single point of political failure for dozens of sovereign chains.

  • Key Problem: Security is a commodity, but governance over that security is not. The Hub becomes a political bottleneck.
  • Key Consequence: Low adoption by consumer chains, as they reject ceding sovereignty for a marginal security premium.
<5
Consumer Chains
1
Governance Bottleneck
03

EigenLayer's Restaking Centralization

By pooling ETH security for Actively Validated Services (AVS), EigenLayer creates a meta-validator set. This concentrates the power to choose and slash AVSs into the hands of the largest restakers and node operators.

  • Key Problem: Capital efficiency is the product; validator centralization is the byproduct. The same top 5 staking providers dominate the operator set.
  • Key Consequence: AVSs face a centralization trilemma: use EigenLayer (centralized security), bootstrap their own (weak security), or don't launch.
$15B+
TVL
~50
Node Operators
04

Polkadot's Parachain Auction Bottleneck

Parachains compete for a limited number of slots via DOT-denominated auctions, creating a capital-intensive barrier to entry. This centralizes slot ownership in well-funded projects and VC-backed entities.

  • Key Problem: Shared security is gated by capital concentration, not technical merit. The auction model is a wealth filter.
  • Key Consequence: The ecosystem fragments into "haves" (parachains) and "have-nots" (parathreads), stifling long-tail innovation.
100
Slot Limit
2 Years
Lease Duration
takeaways
THE CENTRALIZATION TRAP

TL;DR for Protocol Architects

Shared security, from Cosmos to EigenLayer, promises pooled safety but structurally consolidates capital and control.

01

The Capital Gravity Well

Liquid staking tokens (LSTs) and restaking pools create a winner-take-most market. Capital flows to the largest, most trusted pool (e.g., Lido, EigenLayer), creating a single point of economic failure and governance capture.\n- $30B+ TVL in Lido stETH demonstrates the gravitational pull.\n- New chains must bid for security from this concentrated capital base.

$30B+
Dominant Pool TVL
>60%
Market Share
02

The Validator Oligopoly

Delegated Proof-of-Stake (DPoS) and restaking incentivize professionalization, pushing out small validators. The result is a cartel of ~100 entities (like Chorus One, Figment) controlling consensus across multiple chains.\n- Economies of scale in hardware and operations create insurmountable barriers to entry.\n- Cross-chain slashing via Interchain Security (ICS) or EigenLayer amplifies systemic risk.

<100
Key Entities
10x+
Stake Concentration
03

The Governance Monoculture

Shared security models export the governance tokens and voter apathy of the hub (e.g., ATOM, ETH) to all consumer chains. This creates a political monoculture where a small group of whale voters dictates the rules for dozens of sovereign ecosystems.\n- Voting power follows token distribution, not chain-specific expertise.\n- Innovation is stifled by hub-centric upgrade cycles and risk aversion.

<5%
Active Voters
1→Many
Control Ratio
04

EigenLayer's Rehypothecation Risk

EigenLayer doesn't solve centralization; it financializes and multiplies it. The same ~$20B ETH stake can be simultaneously securing dozens of AVSs, creating a tightly-coupled, interconnected risk matrix. A failure in one service can cascade via slashing.\n- Capital efficiency is the Trojan horse for systemic fragility.\n- Operator set overlap means the same few entities are securing everything.

$20B+
Restaked TVL
N→1
Risk Convergence
05

The Modular Illusion

Rollups using a shared sequencer set (e.g., based on Espresso, Astria) or a shared DA layer (e.g., Celestia, EigenDA) outsource critical sovereignty. This recreates the L1 validator oligopoly problem at the sequencing/DA layer, becoming a bottleneck for censorship resistance and MEV capture.\n- Sequencer cartels can extract value across all rollups.\n- DA layer downtime halts every connected chain.

~5
Major DA Providers
100%
Single Point Failure
06

The Sovereign Alternative

The counter-trend is sovereign rollups and app-specific chains with isolated validator sets. While sacrificing shared security's bootstrapping ease, they enforce true sovereignty, tailored economics, and isolated failure domains. Tools like Rollkit and the OP Stack make this feasible.\n- Security is a service, not an architecture.\n- Innovation happens at the chain level, not the hub level.

0
External Slashing
1:1
Stake Alignment
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