Details of the alleged spying operation against Assange and anyone who visited him at the embassy were laid out on Wednesday at his extradition case, in evidence by a former employee of a Spanish security company, UC Global.
Microphones were concealed to monitor Assange's meetings with lawyers, his fingerprint was obtained from a glass and there was even a plot to obtain a nappy from a baby who had been brought on regular visits to the embassy, according to the witness, whose evidence took the form of a written statement.
The founder and director of UC Global, David Morales, had said that "the Americans" had wanted to establish paternity but the plan was foiled when the then employee alerted the child's mother.
Anonymity was granted on Tuesday to the former employee and another person who had been involved with UC Global, after the hearing was told they feared that Morales, or others connected to him in the US, could seek to harm them.
Details of their written evidence were read out at the Old Bailey in London on Wednesday by Mark Summers QC, one of the lawyers for Assange, who is fighting extradition to the US on charges relating to leaks of classified documents allegedly exposing US war crimes and abuse.