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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Luijten and Kempe (1997a, February 01). Added value information. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/added-value-information
, C. (1973a, January 03). Qualitative exploration on handwashing. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-exploration-on-handwashing
, C. (1973a, August 01). Qualitative research on beds for Schreiber. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-beds-for-schreiber
, C. (1975a, February 15). Report on qualitative research on hand and electric kitchen equipment blenders. ANA - ESOMAR. Retrieved March 31, 2023, from
Maguet and Sweet (2019a, November 10). Impact not to be sniffed at: How one study changed the global culture of fragrance. ANA - ESOMAR. Retrieved March 31, 2023, from
Braunschweig, E. (1975a, August 01). Family buying decisions. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/family-buying-decisions
Linde and Linde (1982a, June 15). A combination of hard and soft data to predict family performance. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/a-combination-of-hard-and-soft-data-to-predict-family-performance
Brüne, K. (1995a, June 15). How do promotions work? New evaluation ways by linking scanning analyses and single source household panel data. ANA - ESOMAR. Retrieved March 31, 2023, from
Donius and von Gonten (1996a, November 11). Advertising exposure and advertising effects. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/advertising-exposure-and-advertising-effects