Similar to 行動ターゲティング広告

NebuAd

Nitter

Nym (mixnet)

Phorm

2011 PlayStation Network outage

Proton VPN

RAF Menwith Hill

Signal Protocol

Tuta (email)

Five safes

Legality of recording by civilians

After the Banquet

ECHELON

XKeyscore

End-to-end encryption

Opt-out

Foreign Intelligence Surveillance Act

Safe deposit box

Sucker list

Closed-circuit television camera

Mass surveillance