Re: Avoid recipient-compatibility SHA1

2020-11-18 Thread Ernst G Giessmann via Gnupg-users
Am 2020-11-18 um 14:30 schrieb Stefan Claas: On Tue, Nov 17, 2020 at 11:11 PM Ernst G Giessmann via Gnupg-users wrote: The answer to the second question is: A SHA-1 collision of two documents D1 and D2 means that the hash values Hash(D1) and Hash(D2) are equal, which in turn means

Re: Avoid recipient-compatibility SHA1

2020-11-17 Thread Ernst G Giessmann via Gnupg-users
The answer to the second question is: A SHA-1 collision of two documents D1 and D2 means that the hash values Hash(D1) and Hash(D2) are equal, which in turn means that (regardless who signs) any signature of D1 (be it OpenPGP or SMIME) can also be used as a signature of D2. Any signer and any