Prison-related crime

thumb|alt=Lorenz cipher machine with twelve rotors mechanism|upright=1.5| Lorenz cipher machine, used in [[World War II to encrypt communications of the German High Command]] Cryptography, or cryptology, is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engin

thumb|upright=1.35|British H.M. Revenue & Customs officers with seized smuggled tobacco, 2014. Smuggling is the illegal transportation of objects, substances, information or people, such as out of a house or buildings, into a prison, or across an international border, in violation of applicable laws or other regulations. More broadly, social scientists define smuggling as the purposeful movement across a border in contravention to the relevant legal frameworks.

electronic instrument which detects the presence of metal nearby

unmanned aerial vehicle (UAV) utilized to transport packages, food or other goods

"pay-as-you-go" mobile phone service

thumb|right|A jug of contraband prison wine made from oranges, confiscated from an inmate

improvised knife-like weapon

gang operating within a prison system