Encrypted Message Dying Light 2
Garcia Miller
Having lied to Meyer during the previous quest and kept the "map", Aiden will now have to find a way to decipher it. Andy and Bart mentioned Bart tried to decipher it himself using the Peacekeeper library, but did not have the time to do so properly. So head on over to the Peacekeeper library and speak to Albert and ask him for any books about cyphers and codeturning. Albert will place "Bacon's Cipher" on a nearby table to help Aiden.
Bacon's Cipher:
"A creation of Sir Francis Bacon, some believe it proves the theory that Bacon wrote works attributed to William Shakespeare. Some proponents of the Baconian theory of Shakespeare authorship, such as Ignatius L. Donnelly and Elizabeth Wells Gallup, have claimed that Bacon used the cipher to encode messages revealing his authorship in the Fist Folio.......he used two different type faces slightly differing in weight (boldness).......each of which would represent one character in hius plaintext..... A - aaaaa B - aaaab C - aaaba D - aaabb E - aabaa F - aabab G - aabbaa H - aabbb I, J - abaaa K - abaab L - ababa M - ababb N - abbaa O - abbab P - abbba Q - abbbb R - baaaa S - baaab T - baaba U, V - baabb W - babaa X - babab Y - babba Z - babbb"
Head on over to the Wharf Water Tower in the Muddy Grounds district and head down to its basement. Below the water, on the east side of the wall located a top a grade next to a hard-locked chest is a safe. Use the code from decrypted message (3-21-67) to unlock the safe and get the reward: three level 1 DIY Grenades. Upon obtaining the grenades, the quest is completed.
In Dying Light 2, you play as Aiden, a Pilgrim who came to Villedor looking for his missing sister. Pilgrims know their way around areas with infected and act as the "couriers" of Dying Light's world. That's why Aiden is more than willing to help anyone asking for help which is what Meyer does once you get access to The Peace Keeper's central HQ in north Wharf.
One of the errands you can do for Meyer is "The Deserter," a side quest where you will need to find a missing Peace Keeper. Depending on your choices during that quest, you will be able to start "Treasure Hunt," another side quest where you will need to decipher an old code and find the Peace Keepers hidden loot.
During "The Deserter," you will receive an encrypted note with the location of a Peace Keepers' hidden loot. The note has a substitution cipher that replaces each original letter with a different letter from another alphabet, such as A = aaaaa and B=aaaab and so on. Your job is to find the second alphabet to understand what is written on the note.
To do so, go to the Peace Keeper's central HQ Library and talk to Albert near the bookshelves. He will mention a book that can help you with the note; it will be lying on the table inside the library. Read the book and then the note to start unscrambling the message. Decrypting can take a long time, so here's what the note says:
Now that you know the hidden loot's location, go to the Water Tower in the Muddy Grounds area. If you have already claimed the Water Tower, enter the tower via the main entrance on the ground floor and drop down through the opening on the left.
We use a commercially available Document Management System (DMS) which integrates with Microsoft Outlook 2010. This allows users to save important emails in the DMS so that their colleagues have access to them as well.
At the request of a 3rd party, some users have set themselves up with email encryption, having bought certificates from a CA, installed the certificates into Outlook and exchanged public keys with the client. The email encryption itself works fine, except it is causing problems with the DMS.
A key feature of the DMS is an Outlook add-in which gives users the ability to "Send & File" an email in one operation, both sending the email and prompting for a save location in the DMS to which the same email is BCC'd. When attempting to Send & File an encrypted email (essentially sending an encrpted email to the 3rd party and BCC'ing it to the DMS) users get the error message:Microsoft Outlook had problems encrypting this message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities:
Users can work around this problem by sending the email without filing it into the DMS, then manually filing a copy of the sent email as a separate step. When they do so however other users can't open it because it is encrypted.
To be honest this all seems in order. All the systems (Outlook, DMS & the email encryption process) are doing exactly what they have been asked to do. I have limited sympathy with the users who have set themselves up with a technical solution without consulting me first, but I do want to help salvage this if I can. The obvious solution is to rip this out and start again, probably with TLS encryption between the mail servers of my company and the 3rd party. Before I go that far, however:
You could try importing the certificate in to the trust publisher and trusted root certificate authorities directories of the computer accounts of all the pc in the domain via group policy. I am familiar with worksite and I think your problem here is that worksite is not designed to decrypt the attachments when they are sent and filed. If the users want to use encryption then they will have to manually save the attachments to worksite using the outlook addon for encryption that you are using. I am not familiar with any encryption software that directly supports worksite 8 send and file but it would be best contacting autonomy to find software that they support. I think there are some new options in 9 that allow for encryption.
I'm reading a protocol specification where the procedure is to generate a CMAC, take the first 4 bytes of it, append this authentication tag to the message and then encrypt the message + CMAC together with another key using CTR mode encryption.
If a MAC is encrypted using CTR specifically then specific bits can still be flipped by an attacker. So although the MAC isn't known, specific bits can still be altered in transit. This may allow certain attacks, depending on the error handling of the receiver of the protected messages.
It is possible to truncate the MAC. According to [NIST-CMAC], atleast a 64-bit MAC should be used as protection against guessingattacks. The result of truncation should be taken in mostsignificant bits first order.
There are however protocols where MAC-then-encrypt is used, notably Transport Layer Security (TLS). This actually opens up TLS to some attacks such as the Lucky Thirteen attack, although that attack also requires CBC mode encryption instead of CTR mode encryption.
I am working on creating a license key validation server that unlocks a piece of software. The C++ framework I am using, for the client, has built in functionality that allows the server to send back a POST response with an RSA encrypted message containing data that states the license key is valid for the machine sending the POST.
The way the framework handles response encryption is by housing the public key in the client software and the private key on the server doing a reverse version of typical RSA encryption. I understand that this is not necessarily secure but for this use case it does not matter. I have also read that this may be called signing rather than encrypting but I am unsure.
I have tried a couple different things, mainly using the pycryptodome library but have been unable to get a successful run. Below I have an encrypt and decrypt function I found but it throws an incorrect padding error when attempting to use b64decode. I tried researching how to fix the padding but was unsuccesful.
2018 Macs have Apple's T2 chip, which acts as the disk controller for the flash storage on the logic board. The data is encrypted, regardless of whether you've turned on FileVault. So, technically, the message is correct.
Data on the built-in, solid-state drive (SSD) is encrypted using ahardware-accelerated AES engine built into the T2 chip. Thisencryption is performed with 256-bit keys tied to a unique identifierwithin the T2 chip.
That having been said, I have a 2018 Mac Mini running Mojave and I don't get this error message, using a Seagate 4TB external drive directly connected to the Mac via USB. FileVault is off. There may be some other factor involved in getting the error message (which could still be erroneous).
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I have embarked on this journey to develop a more fundamental knowledge behind cryptography beyond being just a user of cryptography science and engineering libraries in one body of work. Being an ex military communication officer who have had exposure to the art and science of Electronic Warfare , it is too fascinating for me to ignore the historical classical cryptology - Code Name Enigma, Code Name Purple and the work of Alan Turing and Team at Bletchley Park . It ultimately helped a great deal in bringing World War -II to a faster closure. I wish to start the exploratory Elementary Number Theory, Combinatorics, Linear Algebra and Modular Arithmetic with insights into Traditional Ciphers and Modern Cryptography with advent of computing machines. Applications secret sharing, Diffe-Hellman Agreement and key distribution, Elliptic Curve Cryptography and Post Quantum Computing Cryptographic are some areas. I Intend would be to simplify and give practical implementation in python where ever feasible and within limits and power of my capability. I would public some of these musings as web blogs and would like to receive encouragement, insights and exercises from professionals with more knowledge and expertise than my self.
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