RC4 - Stream or Block Cipher?

Arnie335

Hi - Been studying for my CEH and got a practice test question wrong regarding RC4 (TotalTester Digital from Matt Walker AIO). I could have swore I read while studying for SSCP that RC4 is a Stream Cipher but in Matt Walker's AIO book, he states that RC4 is a Block cipher.

So I did some Googling and even Wikipedia shows RC4 as a stream..

"In cryptography, RC4 (Rivest Cipher 4 also known as ARC4 or ARCFOUR meaning Alleged RC4, see below) is the most widely used software stream cipher"

So.. why is Matt and his practice tests (including his digital TotalTester practice exam) showing this as a Block cipher? Am I missing something?

Phileeeeeeep651

In my Sec+ course its saying RC4 is a stream.

emerald_octane

Stream Cipher all day every day.

Justin-

It's most likely a mistake in the book. RC4 is indeed a stream cipher.