What is e-TS?

Why do we need e-TS?

How does e-TS work?

What is the technology behind?

	Cryptography
	Hashing
	Public Key Infrastructure (PKI)
	Digital certificate
	Digital signature
	Time source

To generate a trustworthy timestamp, it requires an accurate time source that cannot be reset to an earlier time value. The time source must be secure from physical and electronic attacks.

A Global Positioning System (GPS) clock can be a good time server. It acquires precision time information from the Global Positioning System satellites. The time can be accurate to within 130 nanosecond (130/1 000 000 000 second).