| HttpSignHeader | Headers supported by HTTP Signature. | 
| HttpSignProvider | A provider that can authenticate incoming requests based on HTTP signature of header fields, and
 can create signatures for outbound requests. | 
| HttpSignProvider.Builder | Fluent API builder for this provider. | 
| InboundClientDefinition | Configuration of inbound client. | 
| InboundClientDefinition.Builder |  | 
| OutboundTargetDefinition | Configuration of outbound target to sign outgoing requests. | 
| OutboundTargetDefinition.Builder |  | 
| SignedHeadersConfig | Configuration of required and "if-present" headers to be signed. | 
| SignedHeadersConfig.Builder |  | 
| SignedHeadersConfig.HeadersConfig | Configuration of headers to be signed. |