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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Biel, A. L. (1972a, September 01). Market segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/market-segmentation-1016
Meckelborg, E. (1971a, June 15). Combining dissonance theory to product space constructs. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/combining-dissonance-theory-to-product-space-constructs
Winkler and Freitag (1972a, June 15). The practical application of market segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-practical-application-of-market-segmentation
Durand, J. (1970a, June 15). Market segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/market-segmentation
Broadbent and Segnit (1974a, September 01). Clustering by product usage. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/clustering-by-product-usage
Freeman, P. (1998a, September 01). Marketing modelling and segmentation . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/marketing-modelling-and-segmentation-
Catling and Patel (2016a, November 18). Big Data and research data. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/big-data-and-research-data
Waterworth, J. D. (1972a, June 15). The significance of segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-significance-of-segmentation
Quatresooz and Vanmarsenille (1988a, June 26). Transnational non-classical segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/transnational-non-classical-segmentation