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Questions tagged [poly1305]

Poly1305-AES is a cryptographic message authentication code (MAC) written by Daniel J. Bernstein. It can be used to verify the data integrity and the authenticity of a message.

Poly1305-AES is a cryptographic message authentication code (MAC) written by Daniel J. Bernstein. It can be used to verify the data integrity and the authenticity of a message.

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Poly1305 variants with bigger output?

This is a rather simple question, but answers are nowhere to be found. Are there any variants of Poly-n hashing algorithms which provide bigger outputs (like 32 instead of 16 bytes)? Or, is there any research which discusses the variability of the…
donaastor
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How does Poly1305 use $2^{130}-5$?

How is the number $2^{130}-5$ used in Poly1305? It operates on blocks that are 128 bits long, but the number has 130 bits. I don't understand how it is used. This comment makes me think it uses integer arithmetic.
Melab
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