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gf_informatik:verschluesselung:symmetrisch [2025-04-01 08:11] – hofgf_informatik:verschluesselung:symmetrisch [2025-04-01 11:46] (aktuell) – [Vorgehen] hof
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   * Was passiert mit anderen (längeren) Schlüsseln?   * Was passiert mit anderen (längeren) Schlüsseln?
   * Warum ist ein Schlüssel nur aus Grossbuchstaben ungünstig?   * Warum ist ein Schlüssel nur aus Grossbuchstaben ungünstig?
- 
  
 #### Vorgehen #### Vorgehen
Zeile 267: Zeile 266:
     return as_np     return as_np
  
-# Play with different keys +# Play with different keys: 
-key = "11110000011001101100010000110101110010111001100100010110000111110001100101000101101110111111000000000011000000111110010111101010111110001110101010101000001111001010110110100111000000000011111111010001111100110111101001111010000001011101010000101111110101001100010101001011011101110101011001110100100001101110110011000110100100111100010011001100100111000000000011011110000100010010001110101100111101010100111100010001010100101100111101101011100110110000000000101000000010100111110010000011101000111001100000101011110000000100110011000001000101001000011101000100100100100010100111110011101011010101010110001011010001001010000111000100100010111001111100011100001000011001100011100110101101111001000110001001111010111111100001111111111111011101100101111100000101000101100101011111111110001010111000101010110011011010111111101111110100000100100101001000100101100111100010101011111111001001101000011001101111000111111110101100001100110110000101100000000010111110001011011010010010000111010010011001101010010100000011101111110100101001111110011010000101001111001111000000010101111001000101100110010111101111001000010110111101000110110101000101110001001011100111110010111001011111111010000010011000011101100110111001001000110001110110011011000011001010001111000101100100001010110011000001011100001011010011010001110101010001111000000111111101110011000010010000111010111000111000110"+#key = "11110000011001101100010000110101110010111001100100010110000111110001100101000101101110111111000000000011000000111110010111101010111110001110101010101000001111001010110110100111000000000011111111010001111100110111101001111010000001011101010000101111110101001100010101001011011101110101011001110100100001101110110011000110100100111100010011001100100111000000000011011110000100010010001110101100111101010100111100010001010100101100111101101011100110110000000000101000000010100111110010000011101000111001100000101011110000000100110011000001000101001000011101000100100100100010100111110011101011010101010110001011010001001010000111000100100010111001111100011100001000011001100011100110101101111001000110001001111010111111100001111111111111011101100101111100000101000101100101011111111110001010111000101010110011011010111111101111110100000100100101001000100101100111100010101011111111001001101000011001101111000111111110101100001100110110000101100000000010111110001011011010010010000111010010011001101010010100000011101111110100101001111110011010000101001111001111000000010101111001000101100110010111101111001000010110111101000110110101000101110001001011100111110010111001011111111010000010011000011101100110111001001000110001110110011011000011001010001111000101100100001010110011000001011100001011010011010001110101010001111000000111111101110011000010010000111010111000111000110"
 key = "1111000001100110110001000011010111001011100110010001011000011111000110010100010110" key = "1111000001100110110001000011010111001011100110010001011000011111000110010100010110"
 key_bytes = binary_to_bytes(key) key_bytes = binary_to_bytes(key)
-key_bytes = text_to_bytes("rõménshÖRÑ")+#key_bytes = text_to_bytes("rõménshÖRÑ")
 key_bytes = text_to_bytes("ROMANSHORN") key_bytes = text_to_bytes("ROMANSHORN")
  
-# Change between ECB and CBC modes+# Change between ECB and CBC modes:
 chaining = False  # False: ECB, True: CBC chaining = False  # False: ECB, True: CBC
  
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 img_encrypted = encrypt(img_bytes, key_bytes, chaining=chaining) img_encrypted = encrypt(img_bytes, key_bytes, chaining=chaining)
  
-# We drop the first block as it only used as initialization vector.+# We drop the first block as it's only used as initialization vector.
 cv.imshow("image", bytes_to_image(img_encrypted[8:], img.shape)) cv.imshow("image", bytes_to_image(img_encrypted[8:], img.shape))
-img_decrypted = decrypt(img_encrypted, key_bytes, chaining=chaining) 
 cv.waitKey() cv.waitKey()
  
 # Test if decryption works # Test if decryption works
 +# img_decrypted = decrypt(img_encrypted, key_bytes, chaining=chaining)
 # cv.imshow("image", bytes_to_image(img_decrypted, img.shape)) # cv.imshow("image", bytes_to_image(img_decrypted, img.shape))
 # cv.waitKey() # cv.waitKey()
  • gf_informatik/verschluesselung/symmetrisch.1743495095.txt.gz
  • Zuletzt geändert: 2025-04-01 08:11
  • von hof