Service blocking
Instant Messaging, Social Networks
Amidst public demonstrations over the sentencing of opposition leader Ousmane Sonko to jail, the government of Senegal blocked access to social networks such as Facebook, Twitter, and YouTube, as well as to instant messaging services such as WhatsApp, Telegram, and Facebook Messenger. Analysis from the Open Observatory of Network Interference (OONI) is that ISPs are blocking sites and services by timing out TLS handshakes. Transport Layer Security (TLS) is the protocol used to make secure connections (ex. "https") to websites and services. TLS connections begin with a "handshake" between the two sites where they set up the encryption mechanism. ISPs are apparently interfering with this handshake process so that a connection cannot be established. The Internet Society Senegal Chapter published a brief statement. An English translation is:
- Total Duration 6 days
Senegal
- Population
- 18,077,573
- UN Classification
-
- Least Developed Country
Local impact
Amidst public demonstrations over the sentencing of opposition leader Ousmane Sonko to jail, the government of Senegal blocked access to social networks such as Facebook, Twitter, and YouTube, as well as to instant messaging services such as WhatsApp, Telegram, and Facebook Messenger. Analysis from the Open Observatory of Network Interference (OONI) is that ISPs are blocking sites and services by timing out TLS handshakes. Transport Layer Security (TLS) is the protocol used to make secure connections (ex. "https") to websites and services. TLS connections begin with a "handshake" between the two sites where they set up the encryption mechanism. ISPs are apparently interfering with this handshake process so that a connection cannot be established. The Internet Society Senegal Chapter published a brief statement. An English translation is:
The Internet Society Senegal Chapter calls for an end to restrictions on social networks such as WhatsApp, Facebook, Twitter, Instagram, TikTok, Telegram, Signal and YouTube observed in the context of the ongoing protests in several regions of Senegal in name of the defense and freedom of digital rights in Senegal. Internet access is a human right.
On 4 June 2023, the blocking escalated as the Senegal Ministry of Communication issued a statement requiring all telecommunications operators to temporarily suspend mobile Internet service.
Related documentation
On 4 June 2023, the Senegal Ministry of Communication issued a statement that mobile Internet access would be temporarily suspended. A contact in Senegal provided the statement:
A follow-up statement from the Ministry was issued on 6 June noting the impending end of the blocking.
Other supporting information
The Open Observatory of Network Interference (OONI) shows that access to at least Twitter, Facebook, Instagram, and YouTube is being degraded.
OONI measurements also show that there is interference / blocking of Facebook Messenger, Telegram, and WhatsApp. Curiously, OONI data shows that Signal message was blocked but now appears to be working for the moment.
Google's Transparency Report also shows the strong drop in traffic to YouTube coming from Senegal.
OONI measurements showed access to instant messaging and popular social media sites resuming across the 6 and 7 June.
