35635
1024-bit RSA keys are equivalent in strength to 80-bit symmetric keys , 2048-bit RSA keys to 112-bit symmetric keys , 3072-bit RSA keys to 128-bit symmetric keys , and 15360-bit RSA keys to 256-bit symmetric keys .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None