Q: Is Twirl still a hypothetical device - no implementation has been publicly reported? ¶
Q: Is Twirl built, it would be able to factor 1024-bit numbers in one year at the cost of "a few dozen million US dollars"? ¶
A: Yes, TWIRL could therefore have enormous repercussions in cryptography and computer security - many high-security systems still use 1024-bit RSA keys, which TWIRL would be able to break in a reasonable amount of time and for reasonable costs.