There is also this quote from Satoshi, which touches on the importance of ring signatures that are used in Monero (and other CryptoNote currencies). Monero is the next generation of evolution in digital currency: private decentralized electronic cash.
Crypto may offer a way to do "key blinding". I did some research and it was obscure, but there may be something there. "group signatures" may be related.
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As an example, say some unpopular military attack has to be ordered, but nobody wants to go down in history as the one who ordered it. If 10 leaders have private keys, one of them could sign the order and you wouldn't know who did it.
Regarding the quote. I'm not cryptographer, but Andersen said that this quote does not really make sense from the cryptographic point of view, and rather proves that Satoshi was not a cryptographer and had only high level knowledge of cryptography. Real cryptographers would never say something like this
Source:
https://www.youtube.com/watch?v=rQ3e1Pzu7iI&feature=youtu.be&t=748So not sure if this is really a quote that Monero want to use this quote from Satoshi, as apparently it has no sense.