# [−][src]Crate bls12_381

`bls12_381`

This crate provides an implementation of the BLS12-381 pairing-friendly elliptic curve construction.

**This implementation has not been reviewed or audited. Use at your own risk.**- This implementation targets Rust
`1.36`

or later. - This implementation does not require the Rust standard library.
- All operations are constant time unless explicitly noted.

## Modules

notes | Notes about how the BLS12-381 elliptic curve is designed, specified and implemented by this library. |

## Structs

G1Affine | This is an element of $\mathbb{G}_1$ represented in the affine coordinate space. It is ideal to keep elements in this representation to reduce memory usage and improve performance through the use of mixed curve model arithmetic. |

G1Projective | This is an element of $\mathbb{G}_1$ represented in the projective coordinate space. |

G2Affine | This is an element of $\mathbb{G}_2$ represented in the affine coordinate space. It is ideal to keep elements in this representation to reduce memory usage and improve performance through the use of mixed curve model arithmetic. |

G2Projective | This is an element of $\mathbb{G}_2$ represented in the projective coordinate space. |

G2Prepared | This structure contains cached computations pertaining to a $\mathbb{G}_2$
element as part of the pairing function (specifically, the Miller loop) and
so should be computed whenever a $\mathbb{G}_2$ element is being used in
multiple pairings or is otherwise known in advance. This should be used in
conjunction with the |

Gt | This is an element of $\mathbb{G}_T$, the target group of the pairing function. As with $\mathbb{G}_1$ and $\mathbb{G}_2$ this group has order $q$. |

MillerLoopResult | Represents results of a Miller loop, one of the most expensive portions
of the pairing function. |

Scalar | Represents an element of the scalar field $\mathbb{F}_q$ of the BLS12-381 elliptic curve construction. |

## Functions

multi_miller_loop | Computes $$\sum_{i=1}^n \textbf{ML}(a_i, b_i)$$ given a series of terms $$(a_1, b_1), (a_2, b_2), ..., (a_n, b_n).$$ |

pairing | Invoke the pairing function without the use of precomputation and other optimizations. |