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backdoor is a method, often secret, of bypassing normal authentication in a product, computer system, cryptosystem or algorithm etc. Backdoors are often used for securing unauthorized remote access to a computer, or obtaining access to plaintext in cryptographic systems.

A backdoor may take the form of a hidden part of a program, a separate program (e.g. Back Orifice may subvert the system through a rootkit), or may be a hardware feature. Although normally surreptitiously installed, in some cases backdoors are deliberate and widely known. These kinds of backdoors might have “legitimate” uses such as providing the manufacturer with a way to restore user passwords.

Default passwords can function as backdoors if they are not changed by the user. Some debugging features can also act as backdoors if they are not removed in the release version.

In 1993 the United States government attempted to deploy an encryption system, the Clipper chip, with an explicit backdoor for law enforcement and national security access. The chip was unsuccessful internationally and in business.

APT29 Used Domain Fronting, Tor to Execute Backdoor

APT29, a/k/a Cozy Bear, has used Tor and a technique called domain fronting in order to secure backdoor access to targets for nearly two...

The uncrackable problem of end-to-end encryption

The government wants a backdoor into WhatsApp.But that won't happen - and it wouldn't fix the problem we have, either.

Report: ‘OilRig’ Attacks Expanding Across Industries, Geographies

The highly-effective malware targets Middle Eastern airlines, government, financial industries and critical infrastructures with a simple but powerful backdoor created by infected Excel files...

Dahua video kit left user credentials in plain sight

Bad code or backdoor? Whichever it was, patch it now Chinese security camera/DVR company Dahua is pushing firmware patches after accusations by a security...

Dahua Patching Backdoor in DVRs, IP Cameras

A researcher claims a backdoor exists in several DVRs and IP-enabled cameras manufactured by Dahua.

This hard drive will self destruct. Data-wiping malware targets Europe

Enlarge (credit: William Warby) Shamoon—the mysterious disk wiper that popped up out nowhere in 2012 and took out more than 35,000 computers in...

Ex penetrated us almost 700 times through secret backdoor, biz alleges

IT man betrayed us for partner, says Columbia Sportswear A sportswear company in Oregon has alleged that a senior IT manager left a backdoor...

We found a hidden backdoor in Chinese Internet of Things devices...

VoIP kitmakers probed IoT devices from a Chinese vendor contain a hidden backdoor that the vendor is refusing to fix, according to security researchers.…

New Mac ransomware, backdoor threats emerge

Despite the macOS-based malware being paraded around the Internet, researchers are finding it hard to score samples.

Mobile malware evolution 2016

The year in figures In 2016, Kaspersky Lab detected the following: 8,526,221 malicious installation packages 128,886 mobile banking Trojans 261,214 mobile ransomware Trojans Trends of the year Growth in the...

Germany, France lobby hard for terror-busting encryption backdoors – Europe seems...

Crypto shouldn't hold back cops, sniffs commission The technology industry has hit back at proposed plans by France and Germany to force EU member...