Back door
Also called: Backdoor · Topic: Transparency, Accountability and e-Governance · NCERT: Beyond NCERT
Meaning
A back door (also written "backdoor") is a hidden way into software or hardware that gets around its normal security checks. Whoever knows about it can secretly enter the system, watch the data or shut the system down, and the owner may never notice. It is a serious cyber-security risk in critical information infrastructure, meaning systems so vital that an attack on them harms national security, such as ports, power grids and telecom networks. This is why governments care about who supplies such equipment and what is hidden inside it.
Example
A US congressional investigation found cellular modems inside Chinese-made ZPMC cranes at US ports. These are small devices that connect to a mobile network, and they had no clear operating purpose. Lawmakers warned the modems could let someone communicate with the cranes from far away. India restricted government buying from bidders in land-border countries in July 2020, but cranes ordered earlier, like Vizhinjam's in 2018, are not covered by that rule.
Don't confuse with
- Lawful interception (IT Act s.69, Telecommunications Act 2023): the State taps communications openly under a law with set procedures. A back door is hidden and needs no legal permission.
- Spyware (for example, the Pegasus case, 2021): harmful software planted on a device from outside after it is in use. A back door is usually built into the product itself.