Joseph Ashwood wrote:
RC-4 is broken when used as intended.
If you take these into consideration, can it be used "correctly"?

James A. Donald:
Hence "tricky"

Joseph Ashwood wrote:
By the same argument a Viginere cipher is "tricky" to use securely, same with monoalphabetic and even Ceasar. Not that RC4 is anywhere near the brokenness of Viginere, etc, but the same argument can be applied, so the argument is flawed.

You cannot use a Viginere cipher securely. You can use an RC4 cipher securely: To use RC4 securely discard the first hundred bytes of output, and renegotiate the key every gigabyte.

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