However Russia's sports minister, Vitaly Mutko, was scornful of the allegations, calling them "a continuation of the information attack on Russian sport".
He warned that the consortium had prepared an "information attack" against Mr. Putin and his associates, and described the articles as "an undisguised paid-for hack job".
Speaking last week, Peskov said western spy agencies were behind an all-out "information attack" against him to destabilise Russia before elections.
Mr Putin denied claims that his air force had killed civilians, calling the reports "information attacks" and saying they surfaced before Russian planes took off.
She added: "All this is the same sort of information attack, the same sort of information war, of which we hear so many times and which, it appears, someone prepared well".
Atypically, the Kremlin made a statement before publication, saying that there would be no response to "honey-worded queries" from reporters, and that Russia regarded the Panama Papers as an "information attack".
Unlike extortion cases, in which hackers typically demand a fee for not disclosing specific proprietary information, attacks by hacktivists put companies in a potentially more precarious and vulnerable waiting mode.
In this article, we discussed the security of Li et al.'s scheme, and show its vulnerability to known session specific temporary information attack.
However, we found some problems with Farash et al.'s protocol, such as a known session-specific temporary information attack, an off-line password-guessing attack using a stolen-smartcard, a new-smartcard-issue attack, and a user-impersonation attack.
Before Hill had revealed this information, he attacked Fielding's Amelia in the London Daily Advertiser on 8 January 1752.
