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SampleSet

Struct SampleSet 

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pub struct SampleSet { /* private fields */ }
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Source images a challenge draws its nine tiles from.

An attacker who holds the same images can render every rotation offline and match the upright tile without any model. Measured at 99.5% top-1 accuracy against a known corpus. Treat the corpus as the security boundary: supply your own, keep it large, and rotate it.

A corpus of n images is fully harvested in roughly n * ln(n) requests, after which its size no longer helps.

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impl SampleSet

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pub fn new(format: SampleFormat, images: Vec<Vec<u8>>) -> Result<Self>

§Errors

Returns CaptchaError::InvalidInput if images is empty, longer than 4096, or contains an empty entry.

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pub fn demo_insecure() -> Self

The eight images published inside this crate.

Anyone can download them from crates.io and precompute the answer to every challenge they produce. Tests, examples and benchmarks only.

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