The best replacement for rc4 is aes.


The best alternatives to rc4 are rated as following:
★★★★★  aes
★★★  3des
★★★  des
★★★  rc5
★  rc2
★  aes 256
★  rsa
★  aes 128
★  blowfish
★  ccdb
★  aes encryption
  vivid air
  rc3
  voxatc
  triple des

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rc4
aes
3des