> This doesn't give you plausible deniability if law enforcement gets their hands on your unlocked phone, as they can see that the file size of the encrypted me

> This doesn't give you plausible deniability if law enforcement gets their hands on your unlocked phone, as they can see that the file size of the encrypted message logs doesn't match the visible content. Hmmm. What about from the get-go saying that the app allocates 100Mbytes of space and fills it randomly at regular time until some encrypted content is generated. That'd put a 100Mbytes log/message limit to conversations but that'd be by design and nobody could be sure those bytes are random or genuine messages. > If the phone is jailbroken and the key for the message logs is leaked, it doesn't help at all. Why would the key get leaked if it's never stored ?