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Arnab Chattopadhayay

Arnab’s expertise lies in providing solutions to complex problems in the area of IT Security. He has 23+ years of experience in leadership roles at large organizations like British Telecom, Tech Mahindra, iViZ (part of Synopsys), Metric Stream, Capgemini, IBM & more. Arnab was one of the key members to have worked in the BT21CN, one of the largest transformation projects in the telecom world aimed at the complete transformation of BT’s telecom network to Next Generation Network (NGN).

AI penetration testing safety architecture diagram showing deterministic guardrails vs trajectory checks

Guardrails Are Not a Safety Architecture

Deterministic controls are essential when AI agents can act. They also have a precise limit: they can enforce what we have specified and can observe. The rest of the safety problem does not disappear. The penetration-testing agent asks to run a command against a customer host. The policy engine checks whether the destination is in… Read More »Guardrails Are Not a Safety Architecture

Combinatorial Belief States Are the Cost of Explicit Uncertainty

Combinatorial Belief States Are the Cost of Explicit Uncertainty

Many objections to belief-state planning are framed as concerns about scalability. In practice, they are concerned about visibility. Systems that avoid explicit belief do not eliminate uncertainty; they merely conceal it. This concealment can appear efficient, but it comes at a cost that is paid later often at the point where decisions matter most. This… Read More »Combinatorial Belief States Are the Cost of Explicit Uncertainty

Demystifying Claude Mythos Preview: The Model That Changed Cybersecurity Forever

For most of the past decade, the trajectory of large language model research followed a familiar arc: scale up the compute, widen the data, tune the alignment, ship the product. Each new generation of models arrived with modestly improved benchmark scores, better instruction-following, and marginally reduced hallucination rates. Opus replaced Sonnet. Sonnet replaced Haiku. The… Read More »Demystifying Claude Mythos Preview: The Model That Changed Cybersecurity Forever

Firecompass ranked #1 AI on HackerOne. Read more →