well this is not totally true,
every system is pontentially uncipherable, but some are more than other
ssl is a compromise between security and ressource usage.
The only 'secure' system in cryptography is infinite size key (used for example for the pone line beetween USA and URRS)

cryptography has made a huge lea forward with informatics but even a bigger one with public key encryption. It is now possible to communicate using really heavy encryption, with mathematical proofs that decrytion time is equivalent to prime factorisation of the key (1024 bit for example makes a challenge)
for keys a little bigger it has been proven that the fast method for factorisation (using erathosteme table (crible in french)) would lead, if posibly technically achieved in the creation of a black hole (data has a weight)

There are technically unbreakable security policies, but there are no secure system, because the security of a system is only based upon the weakest element in the system, wich is in any case the human.

Regards, Benjamin

Ps : as every post require a conclusion, don't worry to much about inherent system security, trusful user is a much more relevant point