Harley believes the use of such tools is justified if done in a lawful manner. "It's analogous to wiretapping done in accordance with due legal process (e.g. where an appropriate warrant has been issued), and it's perfectly logical to employ people who are familiar - or can be trained to be familiar - with the technology," he said.
A spokeswoman from the BKA Press and Information Office declined to comment about the job posting.
(Loek Essers in Amsterdam contributed to this story.)
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