1
W: http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg: Signature by key 3B068FB4789ABE4AEFA3BB491397BC53640DB551 uses weak digest algorithm (SHA1)  

W: There is no public key available for the following key IDs:A040830F7FAC5991  

I have an asus laptop running Ubuntu 16.04 having problems in chrome-stable

uninstalled purged I still get this message in terminal when updating Firefox looks like it is a problem, ideas?

marked as duplicate by TheWanderer, Eric Carvalho, Pilot6, Kevin Bowen, David Foerster May 12 '16 at 15:17

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2

Not a problem to you. It is only a warning, and that is something that Google has to fix by upgrading their keys.

More information can be found here.

There has also been a bug filed. Feel free to star it to help push the bug along.

0

It's not a problem that interferes with anything; you can ignore that message.

See the following AskUbuntu questions about it for more information:

Key uses weak digest algorithm

How to fix apt: Signature by key uses weak digest algorithm (SHA1) after installing Chrome?

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