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, July 31). Whitebread Super Premium Pale Ale name and pack concept testing. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/whitebread-super-premium-pale-ale-name-and-pack-concept-testing
, 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. (1974a, February 03). Guinness competitive advertising evaluation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/guinness-competitive-advertising-evaluation
Nagata, S. (1997a, June 15). The renaissance of Chateau Lagrange. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-renaissance-of-chateau-lagrange
Genter and Gadeib (2007a, November 12). Joining the 4th dimension. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/joining-the-4th-dimension
Scheir and Koornstra (2015a, October 01). Contextual actions speak louder than words. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/contextual-actions-speak-louder-than-words
Simakova and Kavounis (2012a, June 15). Emerging middle class in Russia. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/emerging-middle-class-in-russia
RodrÃguez and Romo (2019a, September 08). Giving control of your history to participants. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/giving-control-of-your-history-to-participants-10729
, C. (1973a, April 19). Qualitative packaging research- Egg based drink. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-packaging-research--egg-based-drink