Encryption Protects Data, Not the Person Who Knows the Key
Encryption turns readable information into scrambled data that can be restored only with the right key. That can stop someone who steals a device or copies its files from reading them. But a key is often something a person can remember, type, or use to unlock a device. If that person is forced to cooperate, the attacker may get access without solving the mathematics at all.
The distinction is between breaking encryption and obtaining the key. A sound encryption system can remain intact while its protection is defeated in practice: the holder unlocks the device, reveals a passphrase, or opens the files. The algorithm has not failed; the real-world circumstances around it have.
Security Depends on More Than the Algorithm
This is why security professionals think in terms of a threat model: the specific people, access, and pressures a system is meant to withstand. Encryption may be designed to resist remote attackers or someone who finds a powered-off computer, yet offer little protection against an attacker who can compel its owner to unlock it.
The same gap appears after a device is unlocked. A key may be available to the software while it works with protected data, so controlling the device or its user can matter as much as attacking the encrypted files. Strong encryption is still valuable, but it addresses a particular problem: unauthorized access to data without the key.
The Human Factor Is Part of the System
Design choices can limit exposure—for example, by separating access among multiple people or keeping less sensitive information available at once. Those measures add complexity and may not help when one person can still reach everything. No encryption setting can, by itself, guarantee safety when access can be forced from the person holding it. The practical boundary of a secure system is therefore not just where the data is stored, but who can be made to open it.
