On Mon, Jun 1, 2015 at 8:50 AM, David Howells [off-list ref] wrote:

Andy Lutomirski [off-list ref] wrote:

quoted

quoted

You can also fudge the signature (or a hash) by adding extra data to or
modifying the data blob and by switching signature values between signature
blobs.

So there's another design error in PKCS#7?  Great!

No.  This applies to *all* signatures where you're signing a hash.

What kind of fudging are you talking about here?  I don't see what
not-intentionally-signed message can be generically fudged to look
like it's signed.

--Andy