“Is it actually safe to charge your iPhone at airport USB ports?”

Key points

• Public USB charging at airports is considered reasonably safe with precautions.
• US agencies warned against it, but security researchers say the threat is overblown.
• Mactans demonstrated a malicious charger prototype at Black Hat USA in 2013.
• Apple added a 'Trust This Computer?' prompt to mitigate data connections.
• To reduce risk, use TSA-compliant power bricks, data blockers, or Secure charge points.