Adi Shamir visa snub: US govt slammed after the S in RSA blocked from his own RSA conf

'If someone like me can't get in to give a keynote, perhaps it's time we rethink where we organize our events'

RSA Adi Shamir, the S in the renowned RSA encryption system, didn't take his usual place on the Cryptographers' Panel at this year's RSA Conference in San Francisco - because he couldn't get a visa from the US government. And he's not alone."