Key length

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wikipedia:Key length

  • 2048 bits
  • 1024 bits
  • 512 bits
  • 256 bits: ed25519

RSA

  • macOS 10.15 (2019) requires that TLS server certificates and issuing CAs using RSA keys must use key sizes greater than or equal to 2048. [1]

OpenSSH

OpenSSH 7.6 (October 2017)

  • Refuse keys length <1024 bits in length and improve reporting for keys that do not meet this requirement.

Related

See also

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