Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Vladimir Levin (hacker):

"

After the compromise of their system, Citibank updated their systems to use Dynamic Encryption Card, a physical authentication token. However, it was not revealed how Levin had gained access to the relevant account access details. Following his arrest in 1995, anonymous members of hacking groups based in St. Petersburg claimed that Levin did not have the technical abilities to break into Citibank's systems, that they had cultivated access to systems deep within the bank's network, and that these access details had been sold to Levin for $100.[citation needed]