A constructed, Base64 encoded and compressed field carrying the Payer Authentication Request Message Fields. The compression algorithm used is a combination of LZ77 and Huffman coding as specified in RFC 1951.
3
termURL
ans..256
M
The merchant URL the ACS will redirect the cardholder to after the authentication has concluded. Please note that Computop Paygate adds the field PayID in the query string to the base URL.