Addition:

On 12/16/25 12:36, Hannah Stern wrote:

bits and with an unually high exponent. Talking of that, are there any specified _upper_ limits for key modulus bits/exponent bits, to curb the potential for partial denial of service attacks?)

I ought to have read the documents. ;) The dkim2 draft says that the exponent MUST be 65537 and that verifiers MAY check signatures for only up to 2048 bit keys (but may allow more). So this is already fully addressed.

Hannah.
--
Hannah Stern

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