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Short answer: no. Longer answer: If your PGP encryption is vulnerable to known-plaintext attacks, then that means PGP is using an old broken cipher. Modern, non-broken crypto (with updated software) will not have vulnerabilities like this. You can encrypt or sign whatever you want and no secret key information will be revealed.


2

For the specific scenario you outline (theft of your computer or hard disk), that will probably work. Note that EFS is based on your Windows password, and Windows' password hashing is incredibly weak by modern standards, so your password will need to be extremely good to prevent a dedicated attacker from brute-forcing the hash. Additionally, EFS provides ...


1

Disclaimer: this is an answer for why this question is too broad. I am not attempting to actually answer the question because that would be, well, too broad. In comments, you said: I think that my question really belongs here and not in cryptography section because it contains nothing about custom techniques and algorithms. The key exchange scheme I ...


1

If the ZIP file only holds that one TXT file, then I'm afraid chances of recovery are low. Try visually inspecting the file's hex dump. A "true", undamaged ZIP file should contain high-entropy, random values (all the more so if it's encrypted too). If there are large swaths of repeated filler characters (0x00, 0xC0, 0xA9, 0xFF...), then that section of file ...


1

Generating rolling code is as simple as passing a secret key (sk) and initialising it with an incremental value of counter. HMAC-SHA256(sk, counter) Most of the key fobs use proprietary algorithms to generate rolling codes. You can't create a universal remote even if you know which algorithm manufacturers are using. The seed value is unique per key fob. To ...


1

The short answer is no. That error means that there is a problem on Openmailbox's end of things and changing how you connect to it will not resolve the problem on their server. You should contact their support, and let them know their SSL is not validating properly, then wait until they fix it before trying to connect to your inbox again.


1

First of all, GCM is a form of counter mode. Which means that unlike with e.g. cipher block chaining, the output of one block depends on exactly one block of input. Worse, yet: You can modify a single bit and the decrypted result will differ in exactly that bit. Because if you are honest, a block cipher in counter mode is not a "block cipher" at all, but a (...


1

Yes, it will work. You can also use VC/TC containers created on a VC/TC-encrypted partition/drive with no problem whatsoever.


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