"Zuck's "privacy focused vision for social networking" mentions no plan or intention to stop selling peoples' activity to third parties", pointed out lawyer Denise Howell.
Here are the key points from his note and what we can learn from these.
"Zuckerberg does understand, however, why people are questioning Facebook's newfound commitment to privacy, ".because frankly we don't now have a strong reputation for building privacy protective services". People are not always keen on sharing public messages with all their networks.
Currently, only WhatsApp is encrypted. Even with group interactions, there is still a limit in the number of people that you can involve. "We want to give people a choice so they can reach their friends across these networks from whichever app they prefer".
"The reason this is so serious is that Mark Zuckerberg openly admits that Facebook can't access".
These "tradeoffs" include the possibility of Facebook getting banned in countries like Russian Federation and Vietnam whose law enforcement agencies do not allow encryption, and also demand that data be stored in local servers within the country.
There are real safety concerns to address before we can implement end-to-end encryption across all of our messaging services ...
End-to-end encryption, which encrypts conversations from the moment they leave the sender's phone until they arrive at the recipient's, prevents anyone in the middle reading it - including Facebook itself. Messaging apps have in the past helped fake news and rumors spread fast, sometimes with deadly consequences. So we won't keep messages or stories around for longer than necessary to deliver the service or longer than people want them. "But people increasingly also want to connect privately in the digital equivalent of the living room", declared Zuckerberg.
"One challenge in building social tools is the "permanence problem". "I believe there's an opportunity to set a new standard for private communication platforms - where content automatically expires or is archived over time", he said.
Zuckerberg said it is becoming more important "to keep information around for shorter periods of time" because "people want to know that what they share won't come back to hurt them later". This would reduce the risk of your messages resurfacing and embarrassing you later.
It is also a day after Forbes dropped him three places on its billionaires list - to No. 8 from No. 5 - after his personal wealth declined by $9 billion in a year dominated by privacy scandals.
The real drive for ephemerality is in the line "share more naturally". How can we trust them? Instagram Stories already prove that we can find even enhanced engagement through Stories compared to content that stays on our news feeds. Interoperability will also enable Facebook to integrate messaging between the Messenger, Instagram and WhatsApp platforms.
Though the content of messages between individuals would be concealed from Facebook, correspondence between users and businesses and between users and Facebook would still be recorded through the platform, Soltani said.