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The "master key" is just the empty password which means that the effective key is all padding. This is documented in section 7.6.3.3 of ISO 32000-1:2008 (availa
by poizan42 7y ago
The "master key" is just the empty password which means that the effective key is all padding. This is documented in section 7.6.3.3 of ISO 32000-1:2008 (available for free from Adobe's website). There was never any real attempt to keep it secret.