in reply to Re^2: Convenient Crypto
in thread Convenient Crypto

Neither is the module that was posted. What's your point?

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Re^4: Convenient Crypto
by Anonymous Monk on Feb 15, 2011 at 15:13 UTC
    Let me explain a little background. In an embedded device exists perl as a means for reliable memory management and possibility to fix bugs remotely. As a "security" (against reverse engineering) the policy is only to run from internal mem. There are three blocks (1536 bytes) available that I try to use for encrypting a database (tied hash) on external mem as a more real means of security. SHA is available because "auth the updates". Blowfish alone is more than 3 blocks.

    Sorry about the missing blanks, but I forgot to "ungolf" this.

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      Doesn't change the fact that SHA doesn't provide encryption. Any use of it is pure obfuscation, not encryption. I'm sure there are encryption algorithms designed for use in memory-tight systems.

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        Read the Source! It is real crypto, because a key is used and every bit of the result depends on every bit of the key and every bit of the plain text.
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