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Daniel Specht
Daniel Specht
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Elliptic Curve Diffie-Hellman (ECDH) with

Public parameters: Ep (a,b) and G = (x, y)
Private Keys: Na, Nb
Public Key: Pa = Na x G, Pb = Nb x G
Secret key: k = Na x Pb = Nb x Pa

Is the algorithm still secure if public key Pb is used more than once with different private keys PbNb? Or are there any requirements to use use a public key more than once in a secure way?

Elliptic Curve Diffie-Hellman (ECDH) with

Public parameters: Ep (a,b) and G = (x, y)
Private Keys: Na, Nb
Public Key: Pa = Na x G, Pb = Nb x G
Secret key: k = Na x Pb = Nb x Pa

Is the algorithm still secure if public key Pb is used more than once with different private keys Pb? Or are there any requirements to use use a public key more than once in a secure way?

Elliptic Curve Diffie-Hellman (ECDH) with

Public parameters: Ep (a,b) and G = (x, y)
Private Keys: Na, Nb
Public Key: Pa = Na x G, Pb = Nb x G
Secret key: k = Na x Pb = Nb x Pa

Is the algorithm still secure if public key Pb is used more than once with different private keys Nb? Or are there any requirements to use use a public key more than once in a secure way?

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Source Link
Daniel Specht
Daniel Specht
  • 93
  • 1
  • 4

Is Elliptic Curve Diffie-Hellman (ECDH) still secure if I use the public key more than one time?

Elliptic Curve Diffie-Hellman (ECDH) with

Public parameters: Ep (a,b) and G = (x, y)
Private Keys: Na, Nb
Public Key: Pa = Na x G, Pb = Nb x G
Secret key: k = Na x Pb = Nb x Pa

Is the algorithm still secure if public key Pb is used more than once with different private keys Pb? Or are there any requirements to use use a public key more than once in a secure way?