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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Biel, A. L. (1972a, September 01). Market segmentation. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/market-segmentation-1016
Tannus and Azambuja (1996a, September 01). The Iguassu project . ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-iguassu-project-
van Eeghen and Gerritsen (2003a, November 05). Every grey cloud has a silver lining. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/every-grey-cloud-has-a-silver-lining
Williamson and Burdus (1966a, June 01). The co-ordination of the research and creative functions in a large advertising agency. ANA - ESOMAR. Retrieved March 31, 2023, from
Wolfe, A. (1978a, June 14). How to adapt research techniques to design and assess corporate image advertising . ANA - ESOMAR. Retrieved March 31, 2023, from
Greenberg, S. (1978a, October 01). The effects of economic and social changes on the children's market. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-effects-of-economic-and-social-changes-on-the-children-s-market
Blades and Parsons (2007a, June 03). TROI. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/troi
Hoyes, P. A. (1966a, June 01). Pre-testing advertisements at early stages of campaign development. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/pre-testing-advertisements-at-early-stages-of-campaign-development
Puleston and Graves (2019a, September 08). The real why and the hidden who. ANA - ESOMAR. Retrieved March 31, 2023, from
https://ana.esomar.org/documents/the-real-why-and-the-hidden-who-10722