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. (1978a, January 01). Research report on attitudes towards Middleton building society. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/research-report-on-attitudes-towards-middleton-building-society
, C. (1970a, September 01). Attitudinal survey into the friction material market for Small & Parkes Ltd.. ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1977a, August 01). Qualitative research into Heinz new product developments. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-heinz-new-product-developments
, C. (1975a, November 30). Report on qualitative research on night cream attitudes and advertising . ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1975a, October 03). Qualitative research into creative developments for Harvey's Bristol cream . ANA - ESOMAR. Retrieved March 31, 2023, from
, C. (1976a, October 01). Qualitative research into the shaving market. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-into-the-shaving-market
, C. (1973a, February 01). New product development: Egg-based drinks. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/new-product-development-egg-based-drinks
, C. (1970a, July 01). Qualitative research on Mac throat lozenges. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-mac-throat-lozenges
, C. (1972a, June 08). Qualitative research on Power Tools. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/qualitative-research-on-power-tools