-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Am 17.06.2015 um 01:45 schrieb Robert J. Hansen: >> Is this a correct interpretation? > > Pretty close. > >> My understanding of en-/decryption is that there is no >> indication of progress toward finding a successful key match of a >> given encryption. > > Not quite. If you're doing a brute-force attack it's easy to > figure out what fraction of the possible number of keys you've > tried, and to present that as a progress bar -- when the progress > bar is half done, you've searched half the possible keys, and thus > there's a 50% chance of finding the key by then. So yes, it's > possible to come up with a pretty good estimate of how long it'll > take to brute-force a cipher, and that lets you do things like > status bars... it's just that the amount of time is, for any good > system, ludicrously big.
I think you can't *really* estimate the time to crack a password, all you can show is the maximum time it will take to try out all possible combinations. But when you tried 20% of all possible combinations there is a chance that the next guess will be right. The /typical Hollywood progress bar/ allways counts up to 100% (or to 00:00 time) at least in my memory. Correct me if I'm wrong. Sincerely DK -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBCgAGBQJVgTROAAoJEA7irlPqaBCOYwMP+wZUVdrj55yaLxB/YzALB/wx pWwIHmaNHFhSmVnSE9VuMQAl92AVMaaNs4+xSBk4LDfT0fo2PIZBrZGjFUfQ+FzJ qO3puVHcvkXTY5mFDpU/51B36wmclrld/k03RcXlnAOa73mlDEnMDTmGKbdwzTOA 3sE2zUHouEVDKVOFCAzlbtHCjGqDf7D0ms7+em3qjt8YM2kBnXsI9KEpoXA0iUNH a9tykZpCx66spXdYv/8Rd1RBwXOkJM/ryd1PMNFSZOA/RytHoUWdJLrJn+om/qmt 918yGeuhdLFuteOb+F/fRw0qddnmcwVdlz6fq3RXLMNLNOfFSKOSHSLktNU9SRyS 2zrVr500AyRLUsvnHL4VWAjINxxKUkP+RD43NBtmmlZy4M+HEG7iU4DqXv3KchrR ufPbZoe/ti57pyBP20eNkDkSrVeJOmFUYJ8P5ZmXuOjam37vrlYd21ngnzz5KeCP dgiNVItvPh0AxU17yhUMCvB39hNowiJGuUsPMzs34sFI2LS7RVr4Skzf65h8P4wO 4a9/VN9vz7GpzBC1PHxU5tu7fSyiFL6E4xpNm2zVkDq1ch1AYdT3WjpRhSrz+cSS LM379TCSMJ9k9J0uji6mMrlhHaZk/OwaFap8TeKvZp9gOoTb1vvFNgiJfvRaAjS6 VXCbtvr5LDCf/DIDxt4k =uXhB -----END PGP SIGNATURE----- _______________________________________________ Gnupg-users mailing list [email protected] http://lists.gnupg.org/mailman/listinfo/gnupg-users
