cookie_definition

Set-Cookie: 
CloudFront-Policy=base64 encoded version of the policy statement; 
Domain=optional domain name; 
Path=/optional directory path; 
Secure; 
HttpOnly


Set-Cookie: 
CloudFront-Signature=hashed and signed version of the policy statement; 
Domain=optional domain name; 
Path=/optional directory path; 
Secure; 
HttpOnly

Set-Cookie: 
CloudFront-Key-Pair-Id=public key ID for the CloudFront public key whose corresponding private key you're using to generate the signature; 
Domain=optional domain name; 
Path=/optional directory path; 
Secure; 
HttpOnly