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chech this one:
https://en.wikipedia.org/wiki/Crypto_AG#:~:text=On%2011%20February%202020%2C%20The,used%20to%20send%20encrypted%20messages.
chech this one:
https://en.wikipedia.org/wiki/Crypto_AG#:~:text=On%2011%20February%202020%2C%20The,used%20to%20send%20encrypted%20messages.