One of the first letters, in which Peter I used a disappearing ink to transfer the collected information , put up for auction
Bruun Rassmusen "Russian art & antiques", appointed on November 27.
Written in 1697 by Peter the deacon Andrei Vinius , the letter contains information gathered by Peter during the so -called " Grand Embassy " - the diplomatic mission of Russia to Western Europe , the main aim of which was to find allies Russia against the Ottoman Empire. Total came to the embassy to 250 people, among them the name of the police officer of the Preobrazhensky Regiment Peter Mikhailov was himself Tsar Peter I. During the embassy king corresponded with Moscow , much of which was either encrypted or hidden using invisible ink . At the auction is the second letter , written by Peter from Riga to address Andrew Vinius - clerk of the council , an associate of Peter I, the postmaster (from December 1675 he was appointed postmaster of " Overseas mail " [ " Riga mail" ] , connecting Moscow and Riga ) . The initial cost of the letter - 80 500 - 105 000 euros.
By the way , it is known that during the reign of Peter I, encryption correspondence developed very actively . There were various cryptographic systems , and even were first used blank characters - characters that do not correspond to any sign of plaintext .