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. (1977a, July 01). Qualitative research amongst UK veterinary surgeons . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-amongst-uk-veterinary-surgeons-
, C. (1979a, March 01). Qualitative research on Dairylea. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-dairylea
, C. (1970a, August 01). Project 061. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/project-061
, C. (1971a, July 01). Report on qualitative research on attitudes and awareness of the Ford Cortina Mark III. ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1973a, April 09). Communications testing- New label designs. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/communications-testing--new-label-designs
, C. (1976a, July 01). Qualitative research on the sausage market. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-the-sausage-market
, C. (1973a, December 03). Report on qualitative research on Silvikrin advertising. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/report-on-qualitative-research-on-silvikrin-advertising
, C. (1977a, July 01). Aquafresh advertising 'tough world'. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/aquafresh-advertising-tough-world-
, C. (1972a, October 24). Qualitative research in Manchester and London on canned meat-pies . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-in-manchester-and-london-on-canned-meat-pies-