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For example , the elliptic curve Diffie–Hellman protocol is a variant that uses elliptic curves instead of the multiplicative group of integers modulo p .
 Diffie–Hellman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Diffie–Hellman