Technical Capability Notice (TCN)
Definition
A power under IPA 2016 s.253 allowing the UK Secretary of State to require a communications provider to maintain the capability to produce intelligible (decrypted) intercept data. Use against Apple's iCloud encryption in 2024 became publicly known and generated international regulatory and commercial controversy.
- Jurisdiction
- United Kingdom
- Statute
- Investigatory Powers Act 2016, s.253
- Authority
- UK Secretary of State
- Notable use
- Apple iCloud encryption, publicly known 2025
Common questions
What obligation does a Technical Capability Notice actually impose on a provider?+
It requires the provider to build or maintain the technical capability to supply intercepted communications data in an intelligible, decrypted form when lawfully required, rather than compelling disclosure of a specific past communication on its own; a separate warrant is generally used to obtain actual content.
Why did the 2024 use against Apple generate international controversy?+
It was reported to require Apple to build a capability affecting end-to-end encrypted iCloud data for users beyond the UK, raising concerns from other governments and privacy advocates that one country's compelled-access order could weaken encryption globally rather than being limited to UK-specific data.
Related terms
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- CLOUD Act 2018
- US Clarifying Lawful Overseas Use of Data Act; allows US-based technology companies to comply with foreign government data demands without MLAT processing,...
- ePrivacy Directive
- Directive 2002/58/EC on privacy and electronic communications; the EU instrument governing the confidentiality of communications content and traffic data. Article 5 prohibits...
- Indian Telegraph Act 1885 S.5(2)
- The primary Indian statutory authority for intercepting telegraph (including telephone and internet voice) communications on grounds of public safety, national security, or...
- IPA 2016 S.56
- Section 56 of the UK Investigatory Powers Act 2016; the statutory provision that renders intercept evidence inadmissible in any legal proceedings in...
- Judicial Commissioner (IPCO)
- An independent judicial figure within the Investigatory Powers Commissioner's Office who approves targeted and bulk interception warrants under the IPA 2016 before...
- MLAT
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- PUCL Judgment 1997
- People's Union for Civil Liberties v. Union of India (1997) 1 SCC 301; the Supreme Court ruling that directed the Indian government...