Bitcoins tend not to be very secure , says richard booth , a consultant at rsa , a cyber-security firm .
网络安全公司rsa的顾问理查德布兹表示,比特币可能不是特别安全。
" This is a loud message for the commercial world , which is wake up , this isn 't all happiness and goodness and new business , " said sam curry , vice-president of security firm rsa .
And then eight years went by . During that time , facebook , twitter , and wikipedia added hundreds of millions of users - all of them logging in with plain old passwords - without a single smart card or rsa token .