function encrypt($plaintext ) { // hash the key to a fixed length $hashed_key = hash('sha256', 'kDLTzj2QGCenCXW8s44h4ddDjeJiuSP2', true); // pad the plaintext with whitespace to be a multiple of 16 bytes $padded_plaintext = str_pad($plaintext, strlen($plaintext) + 16 - strlen($plaintext) % 16); // encrypt the padded plaintext with the hashed key $iv = openssl_random_pseudo_bytes(16); $ciphertext = openssl_encrypt($padded_plaintext, 'AES-256-CBC', $hashed_key, OPENSSL_RAW_DATA, $iv); $ciphertext = base64_encode($iv . $ciphertext); return $ciphertext; } function decrypt($ciphertext) { // hash the key to a fixed length $hashed_key = hash('sha256', 'kDLTzj2QGCenCXW8s44h4ddDjeJiuSP2', true); // decrypt the ciphertext with the hashed key $ciphertext = base64_decode($ciphertext); $iv = substr($ciphertext, 0, 16); $ciphertext = substr($ciphertext, 16); $padded_plaintext = openssl_decrypt($ciphertext, 'AES-256-CBC', $hashed_key, OPENSSL_RAW_DATA, $iv); $plaintext = rtrim($padded_plaintext, "\0"); return $plaintext; } ?>
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, C. (1973a, June 21). Research research into English tourism for Inbucon/Aic Ltd. on behalf of the English Tourist Board. ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1979a, March 01). Qualitative research into growth promotants. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-growth-promotants
Flack, M. (1975a, August 01). Marketing financial services to the 'unbanked'. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/marketing-financial-services-to-the-unbanked-
Davis, J. (1976a, June 01). The market research society diploma scheme. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-market-research-society-diploma-scheme
Stubbs and Hutton (1976a, June 15). Yea-saying. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/yea-saying
Lawford, J. R. (1976a, September 01). An exercise in trade-off. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/an-exercise-in-trade-off
Carter, T. J. (1977a, June 15). Tourism saturation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/tourism-saturation
Clarke and McDowell (1996a, June 15). The importance of marque. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-importance-of-marque
Shaddick, C. (1996a, June 15). Keeping up with the mobile telephone customer. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/keeping-up-with-the-mobile-telephone-customer