the server can store metadata though. who you’re texting, when, how often, etc. - and store that indefinitely. or even store the encrypted message, and when a flaw in the encryption is discovered 10 years later, they’re all readable. their servers could be breached and that info could be siphoned by criminals selling it to the highest bidder.
signals blog had an interesting post about what they’re doing to prevent these issues
the server can store metadata though. who you’re texting, when, how often, etc. - and store that indefinitely. or even store the encrypted message, and when a flaw in the encryption is discovered 10 years later, they’re all readable. their servers could be breached and that info could be siphoned by criminals selling it to the highest bidder.
signals blog had an interesting post about what they’re doing to prevent these issues