AWS

[docs.aws.amazon.com] Using the Authorization Header

Authorization:

• algorithm name
• credential: access-key-id/date/aws-region/aws-service/aws4_request
• signedHeaders: smicolon-separated list of request headers
• signature: 256-bit signature expressed as 64 lowercase hexadecimal characters

multiple chunks

• seed signature
• each subsequent chunk contains the signature for the chunk that precedes it