LessSketchy

by Shih-Ho Cheng

Many posts seem to be great deals ...

Many posts seem to be great deals ...

Cheap! Great LocationNo Credit Check

... but many are really scams!

... but many are really scams!

How can I prevent this?

LessSketchy uses machine learning

to warn you about scams

Where to get training set? Step 1

Just wait... Step 2

Step 3: Re-visit each post

99% Legit

1% scams

How to train the model?

Random Forest

~1% / ~99% k1

k2

kn

Average

Decision

~1% / ~99%

~1% / ~99%

Balanced Random Forest

50% / 50% k1

k2

kn

Average

Decision

50% / 50%

50% / 50%

About Shih-Ho Cheng

B.S. Physics / Math Univ. of Virginia

Ph.D. Astro-Particle PhysicsPenn State Univ.

Love board games!