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*Note: in Acrobat X there is no longer an "Acrobat 9 and later" option on the list because the 256-bit AES algorithm implementation used in Acrobat 9 was flawed.
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*Note: in Acrobat X there is no longer an "Acrobat 9 and later" option on the list because the 256-bit AES algorithm implementation used in Acrobat 9 was flawed.
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