IB Full Form

Inspiring Brilliance, Uniting Intelligence

IB Full Form

Inspiring Brilliance, Uniting Intelligence

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What is the full form of IB?

The full form of IB is 'Intelligence Bureau.' The Intelligence Bureau is India's internal intelligence agency and is reputedly the world's oldest intelligence organisation. Founded in 1887, the IB was initially tasked with monitoring Russian troop deployments in Afghanistan, and it now primarily focuses on internal security and counterintelligence within India.

How Did the IB Evolve Over Time?

  • The IB was established in 1887 during British rule in India.
  • After India's independence in 1947, it was reorganised under the Ministry of Home Affairs.
  • The agency underwent significant changes post the 1962 Sino-Indian War and the 1965 India-Pakistan War, focusing more on internal intelligence.

What Are the Key Functions of the IB?

  • The IB is responsible for gathering internal intelligence, primarily related to internal security threats, terrorism, and counterintelligence.
  • It provides crucial information to other intelligence and law enforcement agencies.
  • The IB also plays a role in vetting government officials and in some aspects of telecommunications security.

How Is the Intelligence Bureau Structured?

  • The IB is headed by an officer from the Indian Police Service.
  • It operates both at the central and state levels, with the Subsidiary Intelligence Bureau functioning at the state level.
  • The agency employs a mix of officers from law enforcement and its own cadre.


The Intelligence Bureau, or IB, is a critical component of India's national security framework. Its role in internal intelligence and counterintelligence is vital for maintaining the country's internal stability and security.

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