A method for obtaining digital signatures and public-key cryptosystems

@article{Rivest1978AMF,
  title={A method for obtaining digital signatures and public-key cryptosystems},
  author={Ronald L. Rivest and Adi Shamir and Leonard M. Adleman},
  journal={Commun. ACM},
  year={1978},
  volume={21},
  pages={120-126}
}
An encryption method is presented with the novel property that publicly revealing an encryption key does not thereby reveal the corresponding decryption key. This has two important consequences: (1) Couriers or other secure means are not needed to transmit keys, since a message can be enciphered using an encryption key publicly revealed by the intented recipient. Only he can decipher the message, since only he knows the corresponding decryption key. (2) A message can be “signed” using a… 

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