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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de Vos et al. (1960a, June 15). Group discussion on "Distribution research" and "Motivation research on the channels of distribution" . ANA - ESOMAR. Retrieved March 31, 2023, from
Hanna, M. (1980a, June 18). Report of working group. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/report-of-working-group-2037
, C. (1973a, January 03). Qualitative exploration on handwashing. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-exploration-on-handwashing
Pike, J. (1973a, January 01). Summary of discussions in group I. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/summary-of-discussions-in-group-i
Newlands, M. (1973a, January 01). Summary of discussions in group III . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/summary-of-discussions-in-group-iii-
, C. (1976a, February 01). Qualitative research into rheumatic diseases. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-rheumatic-diseases
Reinmoeller, H. G. (1968a, November 01). Comment on G. K. Randall and J. A. Farmer's paper. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/comment-on-g-k-randall-and-j-a-farmer-s-paper
Fallaw, E. (1971a, June 15). Report-back from working group III. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/report-back-from-working-group-iii
van Slooten and Verheggen (2011a, September 18). Market research reloaded. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/market-research-reloaded