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Add One-Time Pad Cipher implementation#7113

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Nihhaar0002 wants to merge2 commits intoTheAlgorithms:master

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Add One-Time Pad Cipher implementation#7113

Nihhaar0002 wants to merge2 commits intoTheAlgorithms:masterfromNihhaar0002:otp-cipher

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Nihhaar0002 commentedNov 25, 2025

This PR adds an implementation of the One-Time Pad (OTP) cipher using XOR.

Generates a random key using SecureRandom.
Encrypts and decrypts using XOR.
Validates matching key and message length.
Includes JUnit tests for multiple cases.
Adds comments explaining cryptographic limitations.

All tests passed successfully.

Add One-Time Pad Cipher implementation

21db250

Nihhaar0002 requested review fromDenizAltunkapan,alxkm andyanglbme ascode owners

November 25, 2025 06:24

Fix OneTimePadCipher tests to use JUnit 5

29eae56

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codecov-commenter commentedNov 25, 2025

Codecov Report

❌ Patch coverage is86.66667% with2 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.52%. Comparing base (1c6026e) to head (29eae56).

Files with missing lines	Patch %	Lines
...va/com/thealgorithms/ciphers/OneTimePadCipher.java	86.66%	1 Missing and 1 partial⚠️

Additional details and impacted files

@@             Coverage Diff              @@##             master    #7113      +/-   ##============================================+ Coverage     78.50%   78.52%   +0.01%- Complexity     6752     6758       +6============================================  Files           759      760       +1       Lines         22402    22417      +15       Branches       4400     4402       +2     ============================================+ Hits          17587    17602      +15  Misses         4109     4109                Partials        706      706

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