Is Poly1305 enough for cascading ciphers?

Asked Feb 23 '21 at 22:36

Active Feb 24 '21 at 03:14

Viewed 24 times

ChaCha20 along with Poly1305 provides confidentiality and integrity. Now suppose I cascade AES on top of ChaCha20. Is it safe to assume that the Poly1305 MAC is still secure, even if I cascade multiple ciphers? In other words, is one MAC enough to secure both ChaCha20 and AES?

Problem solved: Is Poly1305 an information-theoretically secure MAC?

edited Feb 24 '21 at 03:14

asked Feb 23 '21 at 22:36

Evan Su

1

Related: https://crypto.stackexchange.com/q/48416/54184. But basically yes. – forest Feb 24 '21 at 02:39
Perfect explanation. Question solved. I'll add the link to my question. – Evan Su Feb 24 '21 at 03:14
Here I marked it as a duplicate for you so you can accept the duplicate link. – forest Feb 24 '21 at 03:25

Is Poly1305 enough for cascading ciphers?

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