Vladimir K. Bukovsky, a tireless opponent of Soviet leaders and President Vladimir V. Putin of Russia, is not a man easily put off his stride. But he got knocked sideways when British police officers banged on the front door of his home ... and informed him that they had received information about forbidden images" in his possession. He faced five charges of making indecent images of children, five charges of possession of indecent images of children and one charge of possession of a prohibited image. After Mr. Bukovsky, 73, entered a not-guilty plea, [the case] was delayed [following] a prosecution request for more time to review an independent forensic report on what had been found on Mr. Bukovsky's computers and how an unidentified third party had probably put it there. Mr. Bukovsky ... insisted that he was the victim of a new and particularly noxious form of an old K.G.B. dirty trick known as kompromat, the fabrication and planting of compromising or illegal material. Old-style kompromat featured ... a wide range of other primitive entrapment techniques. Today, however, kompromat has become allied with the more sophisticated tricks of cybermischief-making. Hacking is not only a good way to get real information ... but a relatively easy and usually untraceable way to plant fake information. This blurring of all boundaries between truth and falsehood in the service of operational needs has created a climate in Russia in which even the most serious and grotesque accusations ... are simply a currency for settling scores.