For fun there are other variants of base64 in a similar spirit [1][2] full unicode. [3] see other links in that repo... Not a stream cipher, just encoding but could be used in conjunction with a stream cipher to add compression. It could go turtles all the way down.
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One could use emojis instead, then the message could be hidden in plain sight in places where emoji-spam is common.
For fun there are other variants of base64 in a similar spirit [1][2] full unicode. [3] see other links in that repo... Not a stream cipher, just encoding but could be used in conjunction with a stream cipher to add compression. It could go turtles all the way down.
[1] - https://github.com/qntm/base2048
[2] - https://github.com/qntm/base32768
[3] - https://github.com/qntm/base65536
Emojis have a high overhead, a single emoji is typically 4 bytes but may be up to 35 bytes.
Yikes! Imagine if people were to start sending photos and videos to each other!
Oh, my bad - I wasn't aware that we're doing serious engineering here :p