# Alg

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

Defined in: [packages/filecoin-encryption-envelope/src/cose/headers.ts:61](https://github.com/FilOzone/synapse-sdk/blob/69355bd6e369f83f8584f621913e16ec36de8193/packages/filecoin-encryption-envelope/src/cose/headers.ts#L61)

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