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Title Spam calls decreased, spam messages increased
Date 2023-04-13 Read 2651
The Korea Communications Commission (KCC, chairman Han Sang-hyuk) and the Korea Internet Security Agency (KISA, President Lee Won-tae) announced the Status of Spam Distribution in the Second Half of 2022 on Friday, March 31.

This data is the result of a survey of spam reports and detection received by mobile phone calls, text messages, and e-mails, the amount of user reception, and the blocking rate of mobile carriers in the second half of 2022 (July 1 to December 31).

As a result of the survey, a total of 21.69 million cases were received and reported by users through mobile phones and e-mails, or detected by KISA on their own, down 23.0% from the previous year (28.18 million).

In addition, a survey of 3,000 users on the amount of mobile phone and email spam received showed that the average daily spam received was 0.36 (1.8 messages received in about 5 days), a decrease of 0.05 compared to the first half of 2022.

Report and Detection of Spam

First, a total of 12.12 million cases were reported or detected through mobile phones down 30.4% (5.29 million cases) compared to the first half of 2022.

Among them, 4.13 million cases were spam calls, down 56.2% (5.29 million) compared to the first half of 2022. By type of spam, illegal loans (32.6%) were the most common, followed by telecommunication subscrptions (30.1%), finance (17.8%), adult advertisements (13.5%), and gambling (4.8%).

By route, wire telephones (57.7%) were the most common, followed by mobile phones (24.2%), Internet telephones (15.1%), and international calls (3.0%).

A total of 7,988,000 cases of spam text messages were reported and detected, down 0.1% (7,000) from the first half of 2022. By type of spam, gambling (40.4%) was the most common, followed by finance (27.7%), illegal loans (15.0%), and adult advertisements (7.1%).

By route, mass text sending service was the most common (95.8%).

There was a total of 9.57 million e-mail spam cases (30,000 cases sent from home and 9.54 million cases sent from abroad), a decrease of 11.1% (1.2 million) compared to the first half of 2022. When it comes to the originating countries of spam sent from abroad, China (82.8%) took up the largest share, followed by Malaysia (2.9%) and the United States (2.8%).

Survey on the Amount of Spam Received by Users

According to a survey of 3,000 mobile phone and e-mail users (aged between 12 to 69) across the country, the average daily amount of spam received by mobile phone users in the second half of 2022 was 0.25, with 0.08 spam calls and 0.17 spam text messages.

Compared to the first half of 2022, spam calls decreased by 0.02, and spam messages increased by 0.01. Spam email was sent an average of 0.11 per day, down 0.04 from the second half of the previous year.

Results of the Survey on Spam Messages Blocking Rate

Meanwhile, the mobile carrier's spam messages blocking rate survey measures the spam messages blocking rate of the "intelligent spam blocking service*" provided free of charge by the three mobile carriers. The average blocking rate in the second half of 2022 was 97.7%, up 0.8%p compared to the first half of 2022.

* It measures the blocking rate by sending 200 test texts once a month using illegal spam messages reported and received to KISA.

The KCC said, "As a result of expanding spam filtering and strengthening restrictions on the illegal spam senders through the ?Voice Phishing Measures in the Communication Sector (22.9.29)? and "Illegal Spam impersonating Banks Distribution Prevention Measures (21.10.28), overall spam reduced."

It added, "However, the amount of spam through mass text messaging is still high, so we plan to strengthen our response to the mass text messaging this year. We will continue to make additional efforts to protect the people from illegal spam."
File 20230331_News_Release_spam.docx 20230331_News_Release_spam.docx
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