What are key fobs and do they improve security?

Learn about key fobs -- small, programmable hardware tokens that provide access to a physical object for security, authentication and other purposes.
A key fob is a small, programmable device that provides access to a physical object.

How to Protect Your Key Fob

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How Does Key Fob Access Control Work? (Simple Guide)

rfid - Tricky apartment key fob copies frequency & code correctly but the copy doesn't work - not a rolling fob - Information Security Stack Exchange

Residential Security System Key Fob

Security experts, police offer advice on how to prevent keyless car thefts - CBS New York

Key Fob, Commercial Security

Fob electronic key

Key Fob Entry Systems - A Complete Guide