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, March 11). Qualitative research on a new soft drink- 'Rio' for Charles Baker, Black & Gross Ltd.. ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1973a, July 01). Existing brands and new propositions . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/existing-brands-and-new-propositions-
, C. (1974a, March 01). Advertising effectiveness study 3100 copier. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/advertising-effectiveness-study-3100-copier
, C. (1973a, December 11). Qualitative research on Stronghold reformulations. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-stronghold-reformulations
, C. (1974a, February 15). Qualitative research on Kleenex Flair advertising. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-kleenex-flair-advertising
, C. (1973a, October 01). Plans for 'brainstorming' session with Ciba-Geigy executives. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/plans-for-brainstorming-session-with-ciba-geigy-executives
, C. (1974a, February 03). Guinness competitive advertising evaluation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/guinness-competitive-advertising-evaluation
, C. (1974a, January 11). Research report on body lotion. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/research-report-on-body-lotion
, C. (1974a, May 03). Qualitative research among Silk Cut smokers, 'diluters' and rejector . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-among-silk-cut-smokers-diluters-and-rejector-