User:Fan Zhang-IHC/sandbox

Traditionally the term ‘physical security’ has been used to describe protection of material assets from fire, water damage, theft, or similar perils. Securing someone's property has long been a concern of people throughout the world. Beyond hiding the objects or constantly guarding them the frequently used option is to secure them with a device. Early solutions included knots to either detect, like the Thief knot, or hamper, like the Gordian Knot. Historians are unsure where the first lock was invented, but evidence suggests that locks initially developed independently in the Egyptian, Greek, Chinese and Roman civilizations. The ancient Egytian lock was dated to be about 4000 years old. The earliest known key-based lock was built during the Assyrian Empire in Khorsabad near Nineveh about 704 BC. It used the same pin tumbler principle employed by many modern locks. Lever tumbler locks were invented in Europe in the 17th century. In 1970s, with the development of micro-electronics technique, Magnetic lock, voice control lock and others modern locks created. However, recent concerns in computer security have caused physical security to take on a new meaning: Technologies used to safeguard information against physical attack.

Phillips, Bill (2005). The Complete Book of Locks and Locksmithing. Chicago: McGraw-Hill Professional. ISBN 0-07-144829-2. Pulford 2007, p. 317

Fan Zhang-IHC (talk) 13:10, 14 April 2013 (UTC)