Editing Cryptography Tricks
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Here are some cryptography tricks that | Here are some cryptography tricks that i've learned with some important people and that helped made this page. They helped a lot with the Keys and Seeds page construction. Use them wisely :) | ||
= AES-CTR tricks = | = AES-CTR tricks = | ||
* Recovery of partial plaintext with two ciphertexts encrypted with same | * Recovery of partial plaintext with two ciphertexts encrypted with same key and iv by knowing where zeroes (\x00) are located | ||
* This trick was used in the recovery of the ebootrom keys | |||
* Xoring these ciphertexts will reveal plaintext where in both locations there are zeroes in one place and plaintext in the other | |||
= AES-CBC tricks = | = AES-CBC tricks = | ||
* The iv of a CBC operation is always the previous block | * The iv of a CBC operation is always the previous 0x10 block, UNLESS it's the starting operation. in this case it is specified by the end-user | ||
= AES-ECB tricks = | = AES-ECB tricks = | ||
* If | * If cbc is used on a block and if the attacker knows where 16 bytes of zeroes are located in known plaintext with given ciphertext location, he can use AES-ECB with the guessed key on that location. if there is a match of the previous 16 bytes as result, the attacker automatically knows the guessed key is the correct key | ||
{{Reverse engineering}}<noinclude>[[Category:Main]]</noinclude> | {{Reverse engineering}}<noinclude>[[Category:Main]]</noinclude> | ||