291 reputation
24
bio website ripple.com
location Oakland, CA
age 44
visits member for 2 years, 7 months
seen Jul 26 at 17:36

I am Chief Cryptographer at Ripple Labs and one of the architects of the Ripple payment system.


Jul
26
comment Default Gravatar on wildcard email addresses unless specified
@DanAtkinson How would the sender get the domain gravatar if they didn't send the hash of the domain?
Jul
25
comment Default Gravatar on wildcard email addresses unless specified
@DanAtkinson If you can try to guess the domain and full email address separately, many email addresses become guessable. Consider an email like mine -- donald@ripple.com. I doubt you'd get that by brute force. But if you pre-hashed the top few million domains, you'd get the ripple.com part. Then if you tried common first names and last names in combination, you'd get the whole thing.
Feb
25
comment Is WolframAlpha doing Math wrong?
@x_puma_x Making the reason question -- why doesn't it in this particular case?
Feb
25
comment Is WolframAlpha doing Math wrong?
It's dangerous to guess, but it's a reasonable inference that it does so in at least some cases.
Feb
25
comment Is WolframAlpha doing Math wrong?
The problem is more likely with 31833823703921105000.
Feb
25
comment Is WolframAlpha doing Math wrong?
There is nothing special about where the decimal point is. Numbers on one side of the decimal point are not different from numbers on the other side of the decimal point.
Feb
24
answered Is WolframAlpha doing Math wrong?
Jan
6
awarded  Enlightened
Jan
6
awarded  Nice Answer
Dec
25
awarded  Yearling
Jan
31
awarded  Editor
Jan
31
awarded  Teacher
Jan
31
revised Default Gravatar on wildcard email addresses unless specified
added 2 characters in body
Jan
31
answered Default Gravatar on wildcard email addresses unless specified
Oct
10
comment Do email services send sender's IP address?
@user121032: The sender's IP address is included; however, what is considered the "sender" depends on the service. Gmail considers its server to be the sender. Hotmail considers the user to be the sender.
Aug
30
comment Why is Google not accepting my phone number?
Try +(1)(533)(90XXXXX). You are halfway between two formats.
Dec
18
awarded  Autobiographer