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. (1979a, February 01). Qualitative research into Kenco coffee bags advertising . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-kenco-coffee-bags-advertising-
, C. (1973a, February 01). Qualitative research on a new TV campaign for standard Nescafe. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-a-new-tv-campaign-for-standard-nescafe
, C. (1973a, September 14). Qualitative research on Bonus Money. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-bonus-money
, C. (1974a, April 18). Report on qualitative research on a PLJ television commercial. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/report-on-qualitative-research-on-a-plj-television-commercial
, C. (1970a, August 01). Qualitative research on Silvikrin television commercials. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-silvikrin-television-commercials
, C. (1973a, March 01). Communications testing: TV commercial Gauntlet "Young man's pint". ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/communications-testing-tv-commercial-gauntlet-young-man-s-pint-
, C. (1972a, July 08). Qualitative research on GII potential advertising approaches. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-gii-potential-advertising-approaches
, C. (1973a, September 03). Qualitative research report on current Matchmaker commercials . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-report-on-current-matchmaker-commercials-
, C. (1974a, January 11). Qualitative research on Lord Ducane Sherry advertising. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-lord-ducane-sherry-advertising