El Chacal began his activities as a
hacker during the 80s. He was one of the founding members of
Piratas Unidos Argentinos in 1986. He was also part of the First Hacking Congress in
Argentina, where he spoke about data
cryptography using
PGP. In the 90s, worried about the invasion of secret networks from the
American government, the
FBI sent one of their agents to their basis in
Montevideo. El Chacal revealed his identity and made a public demonstration at a
cybercafe on
Belgrano of how easy it was to hack those systems. Sentinelli was one of the first Argentine hackers to make his identity public. Afterwards, he began working as a security
consultant. He has worked for private companies and for the government. ==References==