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49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
[](https://godoc.org/github.com/aead/poly1305)
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## The poly1305 message authentication code
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Poly1305 is a fast, one-time authentication function created by Daniel J. Bernstein.
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It is infeasible for an attacker to generate an authenticator for a message without the key.
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However, a key must only be used for a single message. Authenticating two different messages
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with the same key allows an attacker to forge authenticators for other messages with the same key.
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### Installation
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Install in your GOPATH: `go get -u github.com/aead/poly1305`
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### Requirements
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All Go versions >= 1.7 are supported.
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### Performance
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#### AMD64
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Hardware: Intel i7-6500U 2.50GHz x 2
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System: Linux Ubuntu 16.04 - kernel: 4.4.0-62-generic
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Go version: 1.8.0
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**AVX2**
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```
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name speed cpb
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Sum_64-4 1.60GB/s ± 0% 1.39
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Sum_256-4 2.32GB/s ± 1% 1.00
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Sum_1K-4 3.61GB/s ± 1% 0.65
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Sum_8K-4 4.20GB/s ± 1% 0.55
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Write_64-4 2.04GB/s ± 0% 1.14
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Write_256-4 3.50GB/s ± 2% 0.67
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Write_1K-4 4.08GB/s ± 2% 0.57
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Write_8K-4 4.25GB/s ± 2% 0.55
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```
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**x64**
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```
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name speed cpb
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Sum_64-4 1.60GB/s ± 1% 1.46
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Sum_256-4 2.11GB/s ± 3% 1.10
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Sum_1K-4 2.35GB/s ±13% 0.99
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Sum_8K-4 2.47GB/s ±13% 0.94
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Write_64-4 1.81GB/s ± 5% 1.29
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Write_256-4 2.24GB/s ± 4% 1.04
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Write_1K-4 2.55GB/s ± 0% 0.91
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Write_8K-4 2.63GB/s ± 0% 0.88
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```
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