What is the practical strength of DSA1024/Elgamal2048 (former GnuPG default)?

Kristian Fiskerstrand kristian.fiskerstrand at sumptuouscapital.com
Fri Aug 30 14:12:54 CEST 2019

On 30.08.2019 01:02, Brian Minton wrote:
> On Thu, Apr 25, 2019 at 11:19:15AM +0200, Kristian Fiskerstrand wrote:
>> On 4/25/19 9:20 AM, Bernhard Reiter wrote:
>>> Wikipedia points out a strong  sensitivity of the algorithm to the quality of 
>>> random number generators and that implementations could deliberately leak 
>>> information in the signature [3]. This alone probably is a reason to switch 
>>> keys.
>> This isn't really a major point given rfc6979 (
>> https://tools.ietf.org/html/rfc6979 ): Deterministic Usage of the
>> Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature
>> Algorithm (ECDSA)
> Does GnuPG use deterministic DSA / ECDSA?

Yes (at least for modern versions, iirc it was introduced in libgcrypt
1.6.0, but it has been used for 6 or so years)

Kristian Fiskerstrand
Blog: https://blog.sumptuouscapital.com
Twitter: @krifisk
Public OpenPGP keyblock at hkp://pool.sks-keyservers.net
fpr:94CB AFDD 3034 5109 5618 35AA 0B7F 8B60 E3ED FAE3
Corruptissima re publica plurimæ leges
The greater the degeneration of the republic, the more of its laws

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