Ronan Blake
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1995 · Devon

The Black Baron

The first person imprisoned in Britain for writing a computer virus

Christopher Pile, an unemployed programmer from Devon writing as the Black Baron, produced the SMEG engine — a polymorphic toolkit that mutated the appearance of code on each infection so that signature-based scanners could not recognise it — and used it in viruses named Pathogen and Queeg.

He distributed them through bulletin boards and released the engine so others could use it too. He was convicted in November 1995 under the Computer Misuse Act 1990 and sentenced to eighteen months' imprisonment.

Why it mattered

The first British custodial sentence for virus writing, and the point at which polymorphism made signature matching alone an insufficient defence — a problem the industry has been working around ever since.

PolymorphismUKComputer Misuse Act
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