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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Stolte, J. (1972a, September 01). Survey on the problems of transferring a brand from one Western European country to another. ANA - ESOMAR. Retrieved March 31, 2023, from
Tuvee and Bigant (1973a, June 01). Acceptance of a new product relies upon communication. As an example: Introducing of disposables in French hospitals. ANA - ESOMAR. Retrieved March 31, 2023, from
Evrard and Obadia (1976a, March 01). Perception of magazines. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/perception-of-magazines
Auzeill and Chevreux (1995a, July 01). The audience of public radio stations in France. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-audience-of-public-radio-stations-in-france
Desjonqueres and Jeanteur (1967a, August 01). Trends in buying habits in relation to the planned dispersion of shopping centres. ANA - ESOMAR. Retrieved March 31, 2023, from
Fournis, Y. (1967a, August 01). What are the problems facing business firms?. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/what-are-the-problems-facing-business-firms-
Desjonqueres and Jeanteur (1967a, August 01). Trends in buying habits in relation to the planned dispersion of shopping centres (French). ANA - ESOMAR. Retrieved March 31, 2023, from
Raimondi, D. (1997a, June 15). Radio audience surveys in France in 1996. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/radio-audience-surveys-in-france-in-1996
B.V., E. (2002a, June 01). Research World (June 2002). ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/research-world-june-2002-