Encryption is the process of transforming plaintext using a cipher to make it unreadable to anyone except those possessing the key.

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Data recovery from BitLocker encrypted device that has been quick-formatted

I apologize if this is in the wrong place, but I couldn't find anywhere else that seemed appropriate for these questions. My classmate has a 512GB USB drive that he had formatted as exFAT and ...
9
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3answers
386 views

Linux Plausibly Deniable File System

Is there any way to encrypt a linux filesystem in such a way to maintain plausible deniability? E.g. "Hidden OS support," the way Truecrypt and Veracrypt work, they only support Windows OS due to low ...
4
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2answers
826 views

How secure is AES-256-CBC with user provided password and initialization vector

From my understanding the IV is used as a previous block for the first block only. But since each block is used by the following this adds significant security is a IV is provided and not based on the ...
4
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2answers
85 views

Idea for an encrypted pastebin NON-web application

I have an idea for an app that might be useful (though if it isn't, I've still learned in the process, which is what matters). There are a bunch of encrypted pastebin web apps out there (e.g. ...
2
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1answer
135 views

Open source WhatsApp client [closed]

As a follow up to Whatsapp encryption keys discussion and from WhatsApp security whitepaper, it seems that most of the components to a fully secure end-to-end encryption are already there but what ...
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1answer
175 views

Was TRESOR integrated in the Linux kernel?

If a computer is switched off, the data can stay in RAM memory for a while; decaying over about 5 minutes. This can be made longer by cooling the chips: ...
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1answer
60 views

Hide data from user, but process it in application

Is there a way to hide the data that's received somehow from the user? In particular, I have some data that gets send from a webserver to an application. I want the application to process the data, ...
1
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2answers
169 views

Server full disk encryption protection from malware

A group of LINUX servers is using dm-crypt to encrypt data. The servers do not store data long-term but are only temporary stopping points for data before it is sent to other systems. The time the ...
3
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1answer
47 views

Is this good/secure method for client-server communication encryption?

Something came to my mind, and I wonder if this is proper method for client-server communication, and if this method is wide-used. On connection, client generates seed, encrypts it using asymmetric ...
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1answer
391 views

How would one verify that the public key from WhatsApp's servers belongs to the person I expect it to?

WhatsApp had recently announced end-to-end encryption on all communications. While that's an impressive move, I still have a big open question mark. The articles and this white paper suggest that the ...
1
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1answer
43 views

Stateless AEAD (AES-GCM) based tokens

I want to generate secure data tokens which can be shared with the client for uses like password reset, etc. which involves low storage overhead at server end. Ideally I am interested only in managing ...
4
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2answers
193 views

Biometric device instead of password - signature security

Lets assume that there is a bio-metric algorithm for user authentication which compares fingerprints with a user's signature saved in a database (comparing function is not important here). Next, there ...
11
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2answers
273 views

How does WhatsApp's new group chat protocol work and what security properties does it have?

By now everybody has noticed that WhatsApp rolled out full end-to-end encryption recently, for direct communication, for media attachments and for group chats. I've read their white-paper (PDF) and ...
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0answers
60 views

Could someone explain what this error about? [migrated]

Test connection ([Triatin_SALESBANK_SFTP_Receive_Triatin], [SFTP Receive]) failed with message: Unable to logon[user: ****] into target server [***********:22] via SOCKS proxy ...
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2answers
733 views

WhatsApp end-to-end encryption verification [closed]

IS there any way to verify the encryption from remote or so? Like my friend is 1000 miles away from me the physically QR Code scanning is not possible. So is there any way to verify the same?
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1answer
611 views

End-to-end WhatsApp vs Telegram [closed]

What do you think about the latest WhatsApp update? Is now WhatsApp as secure as Telegram? Which one should be trusted? Which one has the strongest and most secure encryption?
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1answer
46 views

Break encryption by applying accidental-overwrite techniques

I read that there are ways, at least on mechanical drives, to sometimes recover data that was overwritten (not just deleted). Now I was wondering if it was theoretically possible to break a fresh ...
1
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1answer
169 views

Network Security with EAP: PEAP and Phase 2: MSCHAPv2?

I want to connect to my college WiFi but I’m worried about the security (data leakage, hacks, MITM). The configuration I used to connect to my college WiFi is as follows, EAP: PEAP Phase 2: MSCHAPv2 ...
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1answer
91 views

Questions on the variations of RSA keys

I've built a simple application that reads in an RSA key, checks the header and starts identifying properties of the RSA key to make sure it is valid (Using child_process in express to run $ ...
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0answers
120 views

WhatsApp end-to-end encryption for all devices [closed]

The news is out, WhatsApp switched on encryption for a billion people. It supports all devices and encrypts texts, photos, videos and calls. There are so many questions that just came to my mind ...
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2answers
3k views

How to check if a transaction on a web connection is encrypted

Someone just asked me: How can I know whether a message or data is encrypted during a transaction on trading website? I know most (maybe all) online trading sites uses encryption techniques ...
17
votes
5answers
10k views

SQL field level encryption, how safe is it?

I am considering encrypting my database and/or encrypting only certain columns in a few tables. Is it worth the time? I mean, how much of a burden would it be on someone if they were to get a hold of ...
3
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1answer
62 views

Is appending plaintext to salt equally safe as appending salt to plaintext

Is using hash(salt, plaintext) equally secure as using hash(plaintext, salt), i.e. can the plain text be appended to salt in place of appending salt to the plain text. Why or Why not? What kind of ...
2
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2answers
100 views

How can I extract the encrypted master key from LUKS header?

I know that a LUKS partition has a plain-text header that stores many informations like master key (MK) digest, MK iterations of PBKDF2, information about the 8 key-slots etc. I also know that in the ...
6
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1answer
110 views

Method for securely removing files from a solid state drive

I've thought of a method for securely erasing single files on a solid state drive. This method will work only if the drive is encrypted, and it will work even if someone cracks the encryption key for ...
4
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2answers
58 views

Does EMV protect against sniffing PAN data from untrusted network?

I have received conflicting information in regards to the security of PAN data on the wire. Can this be sniffed with properly configured EMV at an atm? To quote from the link below: ...
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2answers
88 views

sharing private key sTunnel

All of the sTunnel guides and implementations at work do the same thing, they say once the private key and the public cert are created on the server, you need to cat them together and then share with ...
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2answers
131 views

Does TLS authentication encrypt username as well as password?

I connect to my VPN provider using openVPN. The server uses a combination of username / password and TLS authentication. If I am on a public wifi and connecting to my VPN, is my username encrypted? ...
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0answers
26 views

How to reverse engineer a cryptography algorithm if some input-output pair is known. [migrated]

I am trying to reverse engineer an unknown encryption algorithm. By this, I mean I dont know what kind of algorithm is used to encrypt the words. But I know some input-output pairs. From this point ...
1
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1answer
69 views

Stronger Password-based File Encryption on OS X [closed]

I am wondering if there are any better alternatives than the zip command on the OS X terminal. My intention is to add a password to a compressed file. I have been using: zip -j -e -pMY_SECRET ...
2
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2answers
127 views

Is the RSA private key useless without the password?

I notice whenever I generate a new gpg key (using pgp) I always have to assign a password to it, which makes perfect sense. But if I'm not mistaken, gpg is based on prime numbers. How is this ...
2
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2answers
42 views

Tails, relay nodes tracking

When I open "network map" on Tails, I see a list of IP addresses with locations. What are these? And it's titled "Relay". Does the government have access to all relay nodes on the TOR network as they ...
0
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2answers
172 views

Hashed master password and generated encryption key in a password manager program

I'm writing a WPF password manager application to practice programming, so far this is the scheme I intend to use to store master password and individual site password: Master password: Generate a ...
0
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1answer
104 views

Sending Group Keys over network

For multicast encryption one user creates group keys on his local (Symetric and asymetric). If we encrypt these with other group user's public keys and send over networks . Is this acceptable? Can ...
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4answers
1k views

Is it possible to prevent a physical attack on full disk encryption?

I've been researching into some methods to ensure that disk encryption keys can't be stolen, and one that I've come across is called TRESOR. With this kernel patch, you can create a partition that is ...
2
votes
1answer
197 views

Encrypting data before sending to SaaS tool and decrypting on browser view

I'd like to send data to a SaaS tool, where the data is stored in the cloud. I'll use Google Analytics as an example, but it applies to any similar service. Google Analytics does not allow you to ...
0
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1answer
36 views

Encrypt existing SSH key

I've created an RSA keypair for ssh access to a remote server. This all works. When creating the keypair, I didn't enter a password. Now I would like to encrypt the key, secure it with a password. Is ...
3
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5answers
590 views

Why can passwords be used to encrypt data, but are less strong for authentication?

Encryption software is often password based. Even if the adversary gets your computer they can't get the data without knowing the password, and bruteforcing is infeasible. Websites use passwords to ...
0
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1answer
31 views

Why is calculating the checksum of an IP Datagram header and then encrypting it not appropriate to provide Data Origin Authentication?

So assuming Alice and Bob have agreed to use a particular symmetric cryptosystem and share an appropriate key, they want to achieve data origin authentication by computing the header checksum of an IP ...
6
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3answers
126 views

Android full disk encryption

I am using Android 4.4.4. There is an option called phone storage encryption. From what I have read the crypto is secure. However, I read this article which said Google is able to reset passwords: ...
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1answer
388 views

Are there any alternatives to EFS for transparently encrypting the contents of a folder in Windows?

EFS is not an option for me because I'm using Windows 7 Home Premium. I am looking for folder encryption, not drive encryption.
2
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2answers
42 views

How does GnuPG encrypt secret keys?

When creating a secret key with GnuPG, you are asked for a password to protect it. Which encryption algorithm is used to achieve this? The handbook only says that a symmetric encryption algorithm is ...
79
votes
8answers
211k views

How to determine what type of encoding/encryption has been used?

Is there a way to find what type of encryption/encoding is being used? For example, I am testing a web application which stores the password in the database in an encrypted format ...
-2
votes
1answer
83 views

Public key encryption for initial challenge-repsonse

I understand public key encryption, public key authentication, how digital signatures work and challenge-response authentication, but what confuses me is when they are all combined, and the question ...
4
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2answers
50 views

How to check and trust call encryption software

There are lots of software for mobile operating systems providing end-to-end encryption. What is the best way to decide which one is trustworthy if their source is not revealed? Reverse engineering ...
11
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2answers
638 views

Replay attacks and PGP email encryption

From my understanding of PGP email, the following is possible: Alice sends a message to Bob. Then Bob can take that exact same message and send to Carol while making it seem to Carol like it is from ...
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0answers
100 views

Android default encryption settings

Does anyone know how to change the Android default encryption settings? I want to use AES256, SHA2-512, increase the iterations to 100k and increase the salt to 256bits. Can I use dmcrypt to change ...
157
votes
6answers
18k views

Apple's open letter - they can't or won't backdoor iOS?

Apple released an open letter to the public outlining their reasons for not complying with the FBI's demands to modify the iPhone's security mechanism. Here's a summary: The FBI has an iPhone in ...
7
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1answer
85 views

What's the most secure way to circumvent encryption to enable password recovery?

I have a web app (which I've talked about here before). Users can use it to save people's contact details. These contact details are encrypted to ensure that they are difficult to get at if they're ...
3
votes
1answer
86 views

VPN Authentication and Network Administrators

Is it possible for a network admin (or attacker) to monitor traffic sent to a VPN server during authentication and end up being able to decrypt the data as if they were the legitimate user? I don't ...