On Fri, May 17, 2013 at 11:29 AM, David Vorick <[email protected]> wrote: > Why are so many bits necessary? Isn't 128bits technically safe against brute > force?
Not for RSA keys. A 1024-bit RSA key is considered approximately as strong as an 80-bit symmetric key; 2048-bit keys are approximately as strong as a 112-bit symmetric key, and are the present recommended keysize. See https://www.rsa.com/rsalabs/node.asp?id=2004 (I imagine we will also be considering other asymmetric algorithms for this change, some of which provide more like the usual 1:1 keysize-to-security-parameter ratio.) zw _______________________________________________ tor-dev mailing list [email protected] https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
