Re: Encryption/Decryption Question

On Aug 11, 2010, at 6:50 PM, tedd wrote: > Hi gang: > > Okay, a question to the Encryption/Decryption gurus out there. > > If you were given: > > 1. This encrypted string: > > p3IVhDBT26i+p4vd7J4fAw== > > 2. Were told it was a social security number (i.e., in the form of 123-45-6789). > > 3. And it had been generated from this code: > > $cipher = mcrypt_module_open(MCRYPT_TRIPLEDES,'','cbc',''); > mcrypt_generic_init($cipher, $key1, $key2); > $encrypted = mcrypt_generic($cipher,$social_security_number); > > 4. Where $key1 and $key2 are md5() values calculated from two different security phrases. > > 5. Where each security phrase contains multiple non-English words. > > What would it take for you to break the encrypted string and decipher the social security > number? Can it be done? If so, how long? > > And lastly, where would the "best" place to store these security phrases? (Note: I > didn't ask where would be the best place for me to put them.) :-) > > Cheers, > > tedd > > PS: No, the SS number in question is not 123-45-6789. :-) > > -- > ------- > http://sperling.com/ > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > Tedd- Considering you can brute force the entire keyspace for Triple DES in under a few hours (without specialized equipment) I don't think it would take long. Granted, I'm not an encryption expert. I look forward to hearing more. Thanks, -Josh ____________________________________ Joshua Kehn | Josh.Kehn@gmail.com http://joshuakehn.com