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, June 01). Hot and cold packs . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/hot-and-cold-packs-
, C. (1976a, December 01). Reports on qualitative research on 'coffee with' . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/reports-on-qualitative-research-on-coffee-with-
, 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. (1979a, March 01). Qualitative research into growth promotants. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-growth-promotants
, C. (1972a, August 01). Qualitative research on four new count lines . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-four-new-count-lines-butter-crisp-etc-
, C. (1975a, September 01). Qualitative research on potato products. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-potato-products
, C. (1977a, July 01). Dry mix dessert development . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/dry-mix-dessert-development-
, C. (1970a, June 01). Royal Navy officer recruitment. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/royal-navy-officer-recruitment
, C. (1971a, January 03). Potential demand survey for Mark Lane Ltd.. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/potential-demand-survey-for-mark-lane-ltd-