The magazine said that the recordings had lots of personal information and that it was easily able to find the person whose data was leaked.
The spokesperson also referred to the occurrence as an "isolated single case".
"We resolved the issue with the two customers involved and took measures to further optimize our processes", the spokesman added.
The affected Alexa user was able to confirm the details the magazine had gathered, and also told it that Amazon had not been in contact with him about the breach.
After this meeting, C't magazine searched for the person captured in the audio files. As per the report, the recordings consists of conversations between a male and female.
One of Amazon's newest projects is researching ways to make Alexa a more human-like communicator for customers, but sometimes the virtual assistant's language comes as creepy and offensive.
The customer contacted Amazon about the incident but nothing came out of it; he made a decision to contact CT and provided CT with a sample of the files.
When a person using Amazon.com's voice assistant in Germany requested to listen to his archive of recordings, he got much more than he was expecting.
Imagine you have Amazon Alexa-enabled speakers all over your house. But according to the report there were also hundreds of Wav files and a PDF cataloging transcripts of Alexa's interpretations of voice commands. The messages included various commands like control Spotify, alarms, whether updates, first names and others.
"The potential uses for the Amazon datasets are off the charts", Marc Groman, an expert on privacy and technology policy who teaches at Georgetown Law, told reporters.
Human error was cited as the cause of the issue, but it is unsettling to know that anyone could have gained access to a variety of personal information and private conversations.
It turned out that the guy, who has been given the pseudonym Martin Schneider, had received all the data - 1700 files worth of it - from another customer.
Amazon did not answer Gizmodo's questions about how a human error led to this privacy infringement, or whether the company had initially contacted the victim to inform them their sensitive information was shared with a stranger.
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