jessica ladd's ordeal spurred her to create callisto, so survivors would have a way of reporting sexualault. they can, one, just say what happened to them with a timestamp, doesn't have to go anywhere if they don't want to. two, report electronically to the authorities at their school. 0r three, just say what happened to them for now but report electronically if someone else names the same assailant. you can think of callisto as an international information escrow agency. it holds onto records and only alerts schools when there's a match. students often report to protect others. this matching feature helps do that by detecting repeat offenders. people might use different names, they may look different. how do you make sure you've got the right person? we ask victims to put in notjust the name of their perpetrator, but also a series of unique identifiers. currently, facebook profiles are used to match. some students want more ways to id, and callisto may add mobile numbers and e—mail addresses in the future. 12 us colleges use callisto. the university of san francisco was the first. we k

jessica ladd's ordeal spurred her to create callisto, so survivors would have a way of reporting sexuallt. they can, one, just say what happened to them with a timestamp, doesn't have to go anywhere if they don't want to. two, report electronically to the authorities at their school. 0r three, just say what happened to them for now but report electronically if someone else names the same assailant. you can think of callisto as an international information escrow agency. it holds onto records and only alerts schools when there's a match. students often report to protect others. this matching feature helps do that by detecting repeat offenders. people might use different names, they may look different. how do you make sure you've got the right person? we ask victims to put in notjust the name of their perpetrator, but also a series of unique identifiers. currently, facebook profiles are used to match. some students want more ways to id, and callisto may add mobile numbers and e—mail addresses in the future. 12 us colleges use callisto. the university of san francisco was the first. we kne

which would give survivors away to find out if there are seven is a repeat offender, something jessica laddto this day. that was sumi das, at stanford university. now, while callisto was created a team of mostly women, that is rare. even right here in silicon valley. whenever i have been to visit, i have found it all too easy to think of the valley as sharing the progressive values of san francisco, where all colours and genders seem welcome. but the people i have met, those in charge of the start—ups and attack giants, have been mainly men. it is quite obvious to us that women are underrepresented here, and there are those who feel that silicon valley is just as full of sexism and masculine culture as anywhere else. it is the social challenge... emily chang is a san franciscojournalist, and a host of bloomberg technology. and in her new book, brotopia, she has written about the industry that has written about the industry that has always self—selected for men. first came the antisocial nerd who suddenly became part of the ruling class, and now she says it is the time of the cocky, self—con