Locking Up Secrets With Quantum Keys
Bloomberg Businessweek|January 21, 2019

Banks and governments are testing next-level encryption to protect their dearest treasures

- Jeremy Kahn
Locking Up Secrets With Quantum Keys

Commuters inching through rush-hour traffic in the Holland Tunnel between Lower Manhattan and New Jersey don’t know it, but a technology likely to be the future of communication is being tested right outside their car windows. Running through the tunnel is a fiber-optic cable that harnesses the power of quantum mechanics to protect critical banking data from potential spies.

The cable’s trick is a technology called quantum key distribution, or QKD. Any half-decent intelligence agency can physically tap normal fiber optics and intercept whatever messages the networks are carrying: They bend the cable with a small clamp, then use a specialized piece of hardware to split the beam of light that carries digital ones and zeros through the line. The people communicating have no way of knowing someone is eavesdropping, because they’re still getting their messages without any perceptible delay.

QKD solves this problem by taking advantage of the quantum physics notion that light—normally thought of as a wave—can also behave like a particle. At each end of the fiber-optic line, QKD systems, which from the outside look like the generic black box servers you might find in any data center, use lasers to fire data in weak pulses of light, each just a little bigger than a single photon. If any of the pulses’ paths are interrupted and they don’t arrive at the endpoint at the expected nanosecond, the sender and receiver know their communication has been compromised.

この蚘事は Bloomberg Businessweek の January 21, 2019 版に掲茉されおいたす。

7 日間の Magzter GOLD 無料トラむアルを開始しお、䜕千もの厳遞されたプレミアム ストヌリヌ、9,000 以䞊の雑誌や新聞にアクセスしおください。

この蚘事は Bloomberg Businessweek の January 21, 2019 版に掲茉されおいたす。

7 日間の Magzter GOLD 無料トラむアルを開始しお、䜕千もの厳遞されたプレミアム ストヌリヌ、9,000 以䞊の雑誌や新聞にアクセスしおください。

BLOOMBERG BUSINESSWEEKのその他の蚘事すべお衚瀺
Instagram's Founders Say It's Time for a New Social App
Bloomberg Businessweek US

Instagram's Founders Say It's Time for a New Social App

The rise of AI and the fall of Twitter could create opportunities for upstarts

time-read
4 分  |
March 13, 2023
Running in Circles
Bloomberg Businessweek US

Running in Circles

A subscription running shoe program aims to fight footwear waste

time-read
3 分  |
March 20 - 27, 2023
What I Learned Working at a Hawaiien Mega-Resort
Bloomberg Businessweek US

What I Learned Working at a Hawaiien Mega-Resort

Nine wild secrets from the staff at Turtle Bay, who have to manage everyone from haughty honeymooners to go-go-dancing golfers.

time-read
10 分  |
March 20 - 27, 2023
How Noma Will Blossom In Kyoto
Bloomberg Businessweek US

How Noma Will Blossom In Kyoto

The best restaurant in the world just began its second pop-up in Japan. Here's what's cooking

time-read
3 分  |
March 20 - 27, 2023
The Last-Mover Problem
Bloomberg Businessweek US

The Last-Mover Problem

A startup called Sennder is trying to bring an extremely tech-resistant industry into the age of apps

time-read
10+ 分  |
March 20 - 27, 2023
Tick Tock, TikTok
Bloomberg Businessweek US

Tick Tock, TikTok

The US thinks the Chinese-owned social media app is a major national security risk. TikTok is running out of ways to avoid a ban

time-read
10+ 分  |
March 20 - 27, 2023
Cleaner Clothing Dye, Made From Bacteria
Bloomberg Businessweek US

Cleaner Clothing Dye, Made From Bacteria

A UK company produces colors with less water than conventional methods and no toxic chemicals

time-read
3 分  |
March 20 - 27, 2023
Pumping Heat in Hamburg
Bloomberg Businessweek US

Pumping Heat in Hamburg

The German port city plans to store hot water underground and bring it up to heat homes in the winter

time-read
3 分  |
March 20 - 27, 2023
Sustainability: Calamari's Climate Edge
Bloomberg Businessweek US

Sustainability: Calamari's Climate Edge

Squid's ability to flourish in warmer waters makes it fitting for a diet for the changing environment

time-read
4 分  |
March 20 - 27, 2023
New Money, New Problems
Bloomberg Businessweek US

New Money, New Problems

In Naples, an influx of wealthy is displacing out-of-towners lower-income workers

time-read
4 分  |
March 20 - 27, 2023