Researchers: 307-digit key crack endangers 1024-bit RSA
 

*Source: Ars Technica (http://arstechnica.com/news.ars/post...bit-rsa.html)*
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A 307-digit encryption key has been broken down into primes, and 1024-bit RSA keys are next, according to encryption researchers. Researchers from the University of Lausanne, the University of Bonn, and NTT DoCoMo have broken a new record in discovering the prime factors of a "special" 307-digit number this month, which took 11 months and roughly 100 years of computer time. The number was cracked using the special number field sieve method developed by cryptology professor Arjen Lenstra in the 1980s.

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