I've been checking out various TLS certificates lately and noticed that most of the banks seem to have the following two issues:
1) They do not offer perfect forward secrecy
2) They are still using RC4
So far, all the ones I've checked (TD, JPMorgan, CIBC, Wells Fargo, Bank of America, ING/Tangerine, RBC) use
Though actually CitiGroup and Goldman Sachs are using AES in CBC mode with 256 bit keys, instead of RC4, but still, no forward secrecy, and I would think GCM+SHA256 is better than CBC+SHA, even with 128 bit keys vs 256.
On the other hand, google, facebook, linkedin, and bitcoin exchanges/sites do offer perfect forward secrecy (typically with ECDHE), and unanimously use AES in GCM mode with SHA256 and 128 bit keys.
So my question: why have our banks not upgraded their security, especially given recent attacks on RC4 (though they are mostly theoretical, they do point to possible issues, and RC4 is generally considered less secure than AES)? Also, why would they not offer perfect forward secrecy? Is that an oversight on their part, or possibly for regulatory reasons?
I nearly emailed my bank about this today, but figured I'd throw the question up here first. Of course, cyber attacks on banks are all the rage these days - they ought to use the best encryption they can.