# Alg

> **Alg** = *typeof* `ALG_AES_256_GCM` \| *typeof* `ALG_CHUNKED_AES_256_GCM_STREAM`

Defined in: [packages/filecoin-encryption-envelope/src/cose/headers.ts:63](https://github.com/FilOzone/synapse-sdk/blob/628d3a8812e8612a183a3abe3328169fb741260b/packages/filecoin-encryption-envelope/src/cose/headers.ts#L63)

One of the two content-encryption schemes supported by this package.