I believe the answer is: Sigmund freud
The talking cure was the term that Sigmund Freud used to describe the psychoanalysis that conducted by having conversation with the patient in order to observe their intonation and nonverbal language and determine the cause of their psychological disorder.<span />
Answer:
Trojan
Explanation:
According to my research on different computer viruses, I can say that based on the information provided within the question the type of computer virus being defined is called a Trojan. This is a virus that (like defined in the question) acts as a "back-door" into the victim system. This was named after the Trojan Horse strategy used by the Greeks in order to get into the city of Troy.
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Answer:
A series of meetings in 1814-1815, during which European leaders sought to establish long-lasting peace and security after the defeat of Napoleon.