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  2. PDF24 Creator - Wikipedia

    en.wikipedia.org/wiki/PDF24_Creator

    Integrated preview for PDF editing; PDF encryption, decryption and signing; Change PDF information (author, title, etc.) Compress and shrink PDF files; Add a watermark or stamp a PDF file; Combine pages with a digital paper; Convert to and from PDF; Multiple PDF printers for different purposes since 7.7.0

  3. EFF DES cracker - Wikipedia

    en.wikipedia.org/wiki/EFF_DES_cracker

    In cryptography, the EFF DES cracker (nicknamed "Deep Crack") is a machine built by the Electronic Frontier Foundation (EFF) in 1998, to perform a brute force search of the Data Encryption Standard (DES) cipher's key space – that is, to decrypt an encrypted message by trying every possible key.

  4. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    command-line tools to manipulate, edit and convert documents; supports filling of PDF forms with FDF/XFDF data. PDF-XChange Viewer: Freeware: Freeware PDF reader, tagger, editor (simple editions) and converter (free for non-commercial uses). Allows edit of text, draw lines, highlighting of Text, measuring distance. Solid PDF Tools: Proprietary

  5. Data Encryption Standard - Wikipedia

    en.wikipedia.org/wiki/Data_Encryption_Standard

    The Data Encryption Standard (DES / ˌ d iː ˌ iː ˈ ɛ s, d ɛ z /) is a symmetric-key algorithm for the encryption of digital data. Although its short key length of 56 bits makes it too insecure for modern applications, it has been highly influential in the advancement of cryptography.

  6. ProVerif - Wikipedia

    en.wikipedia.org/wiki/ProVerif

    ProVerif is a software tool for automated reasoning about the security properties of cryptographic protocols. The tool has been developed by Bruno Blanchet and others. Support is provided for cryptographic primitives including: symmetric & asymmetric cryptography; digital signatures; hash functions; bit-commitment; and signature proofs of ...

  7. DES Challenges - Wikipedia

    en.wikipedia.org/wiki/DES_Challenges

    The contest demonstrated how quickly a rich corporation or government agency, having built a similar machine, could decrypt ciphertext encrypted with DES. The text was revealed to be "The secret message is: It's time for those 128-, 192-, and 256-bit keys." [3] DES Challenge III was a joint effort between distributed.net and Deep Crack. The key ...