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PyCrypto v1.1.alpha2 Release Notes 

  •     * Most importantly, the distribution has been broken into two

    parts: exportable, and export-controlled. The exportable part contains all the hashing algorithms, signature-only public key algorithms, chaffing & winnowing, random number generation, various 📚 utility modules, and the documentation.

        The export-controlled part contains public-key encryption

    algorithms such as RSA and ElGamal, and bulk encryption algorithms like DES, IDEA, or Skipjack. Getting this code still requires that you go through an access control CGI script, and denies you access if you're outside the US or Canada.

        * Added the RIPEMD hashing algorithm.  (Contributed by

    Hirendra Hindocha.)

        * Implemented the recently declassified Skipjack block

    encryption algorithm. My implementation runs at 864 K/sec on a 👍 PII/266, which isn't particularly fast, but you're probably better off using another algorithm anyway. :)

        * A simple XOR cipher has been added, mostly for use by the

    chaffing/winnowing code. (Contributed by Barry Warsaw.)

        * Added Protocol.Chaffing and Hash.HMAC.py.  (Contributed by

    Barry Warsaw.) 

        Protocol.Chaffing implements chaffing and winnowing, recently

    proposed by R. Rivest, which hides a message (the wheat) by adding many noise messages to it (the chaff). The chaff can be discarded by the receiver through a message authentication code. The neat thing about this is that it allows secret communication without actually having an encryption algorithm, and therefore this falls within the exportable subset. 

        * Tidied up randpool.py, and removed its use of a block

    cipher; this makes it work with only the export-controlled subset available.

        * Various renamings and reorganizations, mostly internal.