Privacy-focused messaging app Signal is back online after an outage lasting more than 24 hours, an extended downtime caused by a large rush of users switching to the app.Late on Saturday night, Signal posted to Twitter that it was operational once again. Expressing the news using a gif from the movie "Rocky," the app claimed it had "learned a lot since yesterday," as well as thanking the "millions of new Signal users" for their patience."Your capacity for understanding inspired us while we expanded capacity," the tweet concluded.Read more