CAPTCHA: Using Hard AI Problems for Security.

von Ahn, L., Blum, M., Hopper, N. J., & Langford, J. (2003). CAPTCHA: Using Hard AI Problems for Security. Advances in Cryptology — EUROCRYPT 2003.

Type

Book chapter

Intellectual base

Review or monograph

Year

2003

DOI

10.1007/3-540-39200-9_18

ISBN

9783540140399

Link

https://doi.org/10.1007/3-540-39200-9_18

Cited from

economics_finance

Cited by

1 citation across 1 artifact.

Each citation links to the sentence it supports in the citing article.

Primes

• Access Friction
  • In spam defense, CAPTCHAs and identity verification deliberately introduce friction that legitimate users pay once while abusers must pay per account.

    This sourceIntroduces CAPTCHAs as a deliberate entry friction legitimate users pay trivially while automated abusers must pay per account — the canonical adversarial-design case of tuning friction type to exclude the adversary cheaply.

Verification

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Registry ID ref:b6e773675329 · see in the full table