Messenger Encryption proposal criticised Meta.
End to end encryption software would allow users to verify access to their chats with personal codes.
On encryption Meta says 'it is necessary so that users can trust that online conversations are private and secure.'
Facebook has around 2.9 billion users worldwide.
Glitch problems with FB have been reported in Mexico, Canada, Australia and UK.
Priti Patel UK home secretary has signalled her opposition to the move of encryption proposal.
She said 'end-to-end social platforms would be catastrophic.
This proposal has also faced criticism from groups in USA.
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