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I need a alternative encryption alcorithm to AES. It shouldn't be AES, Twofish or Serpent and it must be very strong. I dont care about the performance.

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  • $\begingroup$ What properties do you need? ChaCha is enjoying increased popularity, but being a stream cipher it's not suitable for every application. Depending on the application, authenticated encryption may be a better choice than plain encryption. $\endgroup$ Dec 21 '14 at 16:06
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    $\begingroup$ Why should it not be AES, Twofish, or Serpent? $\endgroup$
    – cpast
    Dec 21 '14 at 16:50
  • $\begingroup$ Because of US algorithms are suspected to have backdoors. $\endgroup$
    – lalebarde
    Aug 17 '16 at 20:38
  • $\begingroup$ You could probably do better encrypt your message with marker and decrypt with X-ray. $\endgroup$
    – DannyNiu
    Feb 21 '19 at 4:52
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Camellia perhaps? NESSIE (EU) and CRYPTREC (Japan) both endorse it.

Your requirements are brief and mysterious so it's difficult to give further suggestions.

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