What is Warrant?
A legal document issued by a judge authorizing law enforcement to conduct a search, seizure, or surveillance, requiring probable cause.
Warrants provide the strongest legal standard for government access to your data.
Requirements
- Must be issued by a judge or magistrate
- Requires probable cause (specific facts supporting suspicion)
- Must describe the specific place to be searched and items to be seized
- Must be executed within a specified timeframe
Warrant vs Subpoena vs NSL
- Warrant: Highest standard (probable cause, judge-approved)
- Subpoena: Lower standard (relevant to investigation, prosecutor-issued)
- National Security Letter: Administrative demand, no judge involved
Digital Warrants
- Carpenter v. United States (2018) requires warrants for cell phone location data
- Riley v. California (2014) requires warrants for cell phone searches
- Stored communications may have weaker protections under ECPA
What You Can Do
Encrypt everything. Even with a warrant, law enforcement can only compel you to produce what they can prove exists. End-to-end encrypted data requires a separate order to compel decryption, which has uncertain legal standing under the Fifth Amendment.
Related Terms
Fourth Amendment
The US Constitutional amendment protecting against unreasonable searches and seizures, which forms the legal basis for many digital privacy rights.
Gag Order
A legal order that prevents a company from disclosing that it has received a government request for user data, often accompanying National Security Letters.
National Security Letter
An administrative subpoena issued by U.S. federal agencies (primarily the FBI) for national security investigations. NSLs come with gag orders preventing recipients from disclosing their existence, making them controversial tools of surveillance.
Subpoena
A legal order requiring a person or company to provide testimony, documents, or other evidence in legal proceedings. Service providers may receive subpoenas demanding user data, which is why privacy-focused services minimize data collection.
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