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128 lines
3.7 KiB
Plaintext
128 lines
3.7 KiB
Plaintext
#let fill = box(width: 1fr, repeat(sym.space))
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#set heading(numbering: "1.1.")
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#show heading: set text(12pt)
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#show outline.entry: it => link(
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it.element.location(),
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it.indented(it.prefix(), it.body()),
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)
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#set par(justify: true)
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Network Working Group #fill T. Developer \
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Internet Engineering Task Force (IETF) #fill (Your Organization) \
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Request for Comments: XXXX #fill (Your Email) \
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Category: Informational #fill (Today’s Date)
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#align(
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center,
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upper(
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text(
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14pt,
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"RFC SULA-ALUS: A Reversal Encryption Algorithm",
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),
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),
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)
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#heading("Status of This Memo", numbering: none, outlined: false)
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This memo provides information for the Internet community. It does not
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specify an Internet standard of any kind. Distribution of this memo is
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unlimited.
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#heading("Abstract", numbering: none, outlined: false)
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This document describes the SULA-ALUS encryption algorithm—a lightweight,
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reversible transformation whose principal operation is to reverse the input
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plaintext. The algorithm’s name pays homage to the Latvian wordplay where
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reversing "sula" gives "alus."
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Although trivial in its operation, this algorithm may serve educational,
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demonstrative, or low-risk obfuscation purposes.
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#outline(
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depth: 3,
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title: "Table of Contents",
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)
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= Introduction
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The SULA-ALUS algorithm is founded on a straightforward principle: encryption is
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performed by reversing the order of characters (or bytes) of the input data.
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While the transformation is simple and not intended for modern security-critical
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applications, it can be useful in contexts where a reversible obfuscation method
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is acceptable or for educational purposes.
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= Conventions Used in This Document
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The key words "MUST," "SHOULD," and "MAY" are to be interpreted as described in
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RFC 2119 @rfc-2119.
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= The Reversal Encryption Algorithm
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The core idea behind SULA-ALUS is that the encryption operation is identical to
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the decryption operation -- they both consist of reversing the input sequence.
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== Encryption Process
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Let $P$ represent the plaintext composed of a sequence of characters:
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$ P = p_1, p_2, ..., p_n $
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The ciphertext $C$ is produced by applying the reversal transformation:
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$ C = "reverse"(P) = p_n, p_(n-1), ..., p_1 $
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For example, if $P = "sula"$, then:
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$ C = "alus" $
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== Decryption Process
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Given that the reversal operation is an involution (its own inverse), the
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decryption process involves applying the same transformation.
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Let $C$ be the ciphertext; then the plaintext $P$ is recovered as:
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$ P = "reverse"(C) $
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= Implementation Considerations
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A simple pseudocode implementation of the algorithm is as follows:
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```
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function encrypt(plaintext):
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return reverse(plaintext)
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function decrypt(ciphertext):
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return reverse(ciphertext)
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```
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This algorithm may be implemented in any programming language.
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It is important to note that due to its simplicity, SULA-ALUS is only
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appropriate for applications where robust cryptographic security is not a
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requirement.
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= Security Considerations
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The SULA-ALUS algorithm offers minimal protection and should not be used as a
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substitute for established cryptographic methods. Its reversible nature and lack
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of key-dependent randomness make it vulnerable to trivial analysis and
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brute-force reversal. Users are cautioned against employing this algorithm in
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scenarios where the confidentiality or integrity of sensitive data is paramount.
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= IANA Considerations
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This document has no actions for the Internet Assigned Numbers Authority (IANA).
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= Acknowledgments
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The authors thank the community for insights into minimalist cryptographic
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mechanisms and for inspiring creative approaches that celebrate cultural
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references—in this case, the reversal of the Latvian word "sula" to "alus."
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#bibliography(
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title: "References",
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"bibliography.yml",
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)
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