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... in the same sense that ROT13 or base64 would be a cipher.
A bad substitution cipher is still a cipher. Just one you shouldn't use for anything important.
... in the same sense that ROT13 or base64 would be a cipher.
Base64 is an encoding. It's an algorithm, no attempt at secrecy, thus not a cipher.
Earlier quoted context omitted.
Like i said, by these measurements, base64 would also be a cipher.
And people are telling you yes, they (rot13 and base64) are indeed ciphers. What's the confusion?
Maybe this differentiation is not popular or well accepted, but it was surely part of my cryptography curriculum and the following exam. I'd rather believe my prof than strangers on the internet.
... in the same sense that ROT13 or base64 would be a cipher.
Rot 13 is a cipher. It's a substitution cipher, and more specifically a shift cypher or Caesar cipher. It's not a secure cipher but it is one. Base64 is an encoding. It's an algorithm, no attempt at secrecy, thus not a cipher.