are 1024-bit foolscap keys long enough?

[davidsarah]

elb: while I'm active here, let me mention something else that bothers me ... it appears that the ssl keys used to protect tahoe's foolscap transport are rather strictly limited to 1024-bit self-signed keys

elb: and that appears to be decided within foolscap

elb: it would be kind of nice to be able to use a) longer, and b) signed keys

Note that this doesn't affect Tahoe's confidentiality and integrity guarantees for files; it affects things like confidentiality of write enablers, which is (only) a denial-of-service issue.