密码学的力量不仅在于保守秘密，还在于在数字世界中建立信任。
生命真正的意义是种树，而不指望坐在树荫下。
I don't need a reason to be grateful.
If you had one shot, or one opportunity to seize everything you ever wanted in one moment, would you capture it or just let it slip?
And I hope you will come back here to Harvard 30 years from now and reflect on what you have done with your talent and your energy. I hope you will judge yourselves not on your professional accomplishments alone, but also on how well you have addressed the world's deepest inequities…on how well you treated people a world away who have nothing in common with you but their humanity.