RC4 is the name of a symmetric key stream cipher algorithm.
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Encryption
“To alter (a file, for example) using a secret code so as to be unintelligible to unauthorized parties.” The American Heritage® Dictionary of the English Language, Fourth Edition, Copyright © 2000 by Houghton Mifflin Company. See Cipher.
View PostDigital Signature
A digital signature is a process performed on a data stream that is based on the use of public key cryptography and cryptographic message digests. The purpose and function of a digital signature is twofold: Determine the data “signed” has not been altered Determine the person or entity who signed the data has been authenticated. […]
View PostAdvanced Encryption Standard (AES)
The Advanced Encryption Standard (AES) was adopted by the US National Institute of Standards and Technology (NIST) to replace the Data Encryption Standard (DES). With regard to PDF; Adobe added 128 bit AES to PDF 1.7; and, 256 bit AES to PDF 1.8.
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