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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Where to find modern information on cipher suite strength?

I am hardening the configuration for my /etc/ssh/sshd_config and have a few choices for Ciphers: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128, aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,...
0
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1answer
26 views

Stolen Remote Desktop Protocol (RDP) credentials

I would like to know how to guard against RDP-renting services such as dedicateexpress.com which rents out stolen corporate laptops credentials. Are there IDS for such events?
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2answers
70 views

Bruteforcing hardware-encrypted SSD

Can you bruteforce a hardware-encrypted SSD drive? I mean recovering the password needed to unlock the drive. Is there any software could do this?
2
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2answers
2k views

Is it true that encryption bit “strength”, although numerically identical, may actually be different depending on the algorithm?

I was reading recently that for AES, the encryption strength is actually the key size/length, so 128-, 192- or 256-bit. While, for SHA-2, the encryption strength is measured against the message digest ...
2
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1answer
353 views

P12 private key vs private key file : what is more secure?

The question is a bit tricky because they don't have the same purpose but : Do both kind of file face the same security issue concerning private key protection : password strength? (PBKDF2 as both ...
8
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2answers
488 views

With Google's new Privacy Policies going into effect soon, how can I better protect myself using their services?

From what I can tell, the gist of the new Privacy Policy from Google is that they're making a blanket policy to allow using your data between all their services, however they see fit. So now one ...
0
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1answer
57 views

How to crack encrypted disk (crypto-LUKS) in an efficient way?

I had a disk encrypted by crypto-LUKS but forgotten password. I read a question posted here. LUKS HDD Encryption crack But before that I want to know if there's some free software I can use to ...
2
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2answers
8k views

How to set up a user-friendly NAS encryption?

We recently installed one NAS drive (Buffalo LinkStation Pro Duo, LS-WVL, running the most recent Firmware version 1.6 to be precise) in our (small) company network. Currently, there is no encryption ...
11
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4answers
4k views

How likely/possible is it that the NSA have broken common encryption techniques such as SSL/TLS?

Jumping on the NSA/Prism questions bandwagon - There's been a lot more attention drawn to facilities such as Room 641A which indicate that the NSA has been, amongst other things, applying mass ...
0
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2answers
112 views

Content on a usb flash drive available for a limited time [closed]

I need to distribute some content on a USB flash drive. This content should be available for a limited time only. I am looking for some approach to achieve above. So far I do not have information ...
0
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4answers
171 views

Secure way to create encrypted file

What is the secure way to encrypt a file with a key? Since it will be a small file, is using AES good enough for this assuming I keep the key in memory? So what I can do is just use AES for encryption/...
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0answers
32 views

Diagnose encryption problem in Microsoft Outlook?

I am unable to send an encrypted email to a party for whom I have a certificate. How can I diagnose the problem? Microsoft's error message does not explain what the problem is: Notes: The party's ...
0
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1answer
56 views

What happens when attacker disrupts the ssl handshake?

I have recently understood how SSL handshake works.I understand that once the handshake is done, everything is shared by secret key between server and client. I want to know what happens if Man in the ...
-1
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1answer
49 views

Secure PIN verification if HTTPS is decryptable by third party

I'm developing a system where mobile applications communicate with server through HTTPS. The communication consists of two phases: at first, app "registers" at server: among other stuff, user chooses ...
0
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0answers
25 views

How does Whatsapp implement end to end encryption? [duplicate]

I see in my phone that messages are end to end encrypted and no third person can see the message. Let's say A has B in his contacts. To send a message to B, A and B should use the same secret key. How ...
0
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2answers
354 views

Are files hosted on cloud servers/websites/databases manually checked by people?

I was wondering ... when I upload a file to, say, Dropbox, does anybody personally check it to see what it is? Say I upload a copy of my Blu-ray movie to cloud storage ... will anyone check, and ...
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0answers
47 views

AES keyfile size

I would like to encrypt files using a key file instead of a password. What I would do is: 1) Generate X random bits using openssl rand X > mykey 2) openssl enc -aes-256-cbc -in secretfile -out ...
-1
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1answer
123 views

Exchange of encrypted files through a server

I have a thing to do, that basically bases on a server that is honest but curious. Therefore I want the server to have the public key for encryption and it will encrypt files during the process of ...
-1
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3answers
309 views

Virus using input from victims mic to generate encryption keys

I am a software engineer from Bucharest and I've created an audio based encryption and authentication application called WaveCrypt. It basically allows users to encrypt (AES) their files with an ...
2
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1answer
64 views

How safe is this “Multidimensional-Encryption method” (includes xAES, familiar from Unseen.is)?

I would like to ask about this encryption method that I found: USPTO patent and it is related to this question here: A service that claims beyond army level encryption Didn't see any updates on this ...
0
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0answers
17 views

Enigmail: Issue about sending to old key

So I have set up a new GPG key for myself. I previously had one under the same email, but it has since been revoked. I installed enigmail on my new system with this new key and It seems that it is ...
1
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4answers
922 views

Protect database data from everyone, including sys admins, etc

One of the things that has always bothered me about simple database data encryption: If the server is compromised, the database is effectively compromised. The attacker can use the same code as the ...
0
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1answer
40 views

Veracrypt options to protect against multiple versions of an encrypted volume

I'm planning to use rsnapshot to backup a veracrypt volume as it changes. This means I will have multiple versions of the same volume, with slight differences in data. It is my understanding that ...
3
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1answer
75 views

OpenSSL's EVP functions, more specifically EVP_SealInit

Reference: https://wiki.openssl.org/index.php/Manual:EVP_SealInit%283%29 I want to securely share a symmetrical key between two endpoints using OpenSSL's EVP interface. Transferring the encrypted ...
9
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1answer
964 views

Is Bluetooth 4.0 traffic encrypted by default/design?

I wonder if the BLE (v4.0) traffic is encrypted by default or by design, or is it just optional? If the former, is the traffic encrypted using a key derived just from the pairing pin or is there some ...
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4answers
10k views

Can Cryptolocker (Or Other Ransomware) Encrypt Files That Are Already Encrypted?

If you have already encrypted files, are they still vulnerable to being encrypted a second time by a program like Cryptolocker, or would this protect them?
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2answers
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Managing the public keys and certifications of S/MIME protocol

I don’t have any experience in the security field, and I want your help. I want to ensure if the following suggestion is applicable and secure, if it’s not, please give me your suggestion to solve the ...
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0answers
52 views

Securing data with three USB drives problem

Here is a problem. There is a single piece of sensitive data, which is subject to update and invalidate previous non-updated copies (think of password-protected Bitcoin Core wallet.dat). There are ...
8
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4answers
2k views

How to store data that the computer can read but not the user?

In the TV series The Office, Dwight says he uses a diary to keep secrets from his computer. I'm wondering if the opposite is possible: can my computer create a file that it can read but I can't? I ...
3
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0answers
184 views
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Ansible Vault - what is it doing?

I was looking at Ansible Vault which is used for encryption in Ansible playbooks. The Ansible documentation seems to be thin on details of how it works, apart from mentioning that the default cipher ...
4
votes
1answer
95 views

Security of cellular-connected devices

The EFF Secure Messaging Scorecard lists a number of apps that meet all of its security criteria. So assuming that end-to-end encryption is accessible for the majority of people in countries in which ...
2
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1answer
181 views

OpenID Connect: Why use authorization code flow?

I have a question about implementing OpenID Connect I was hoping I could get some help on. I understand the different flows and get that the authorization code flow is good because it allow client ...
3
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0answers
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Does Oracle's GuardedString protect sensitive data against heap or memory dumps?

Oracle's org.identityconnectors.common.security.GuardedString states this in its documentation: The GuardedString class alleviates [the problem that string data is kept in memory as clear text] by ...
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1answer
50 views

Sensitive files in the Cloud: Automated mounted TrueCrypt volume

My current setup currently I'm using Boxcryptor Classic 1.x (still compatible to EncFS) to mirror some files with SyncBack Pro into the virtual Boxcryptor-Harddisk. Those get then encrypted by BC ...
2
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5answers
173 views

How secure is a password protected file?

I have a password-protected excel file that stores other personal passwords. Obviously there have been a number of ways to crack the password. community.spiceworks.com Where do you guys store ...
2
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2answers
53 views

Asymmetric key encryption that can have a public decryption key, but encryption key cannot be computed from that [duplicate]

Is there a way where I can distribute a public decryption key, but the encryption key cannot be computed from that key, so that anyone who reads one of my encrypted message, he/she can be quite sure ...
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votes
1answer
45 views

Decrypting keys at the software application level [on hold]

Does anyone know what the most common method of decrypting data is? I.e., if something is hashed and not decrypted at the firewall, how is it usually decrypted within a system? Is it integrated into ...
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0answers
42 views

How do I decrypt this unknown cipher text? [duplicate]

I got this unknow cipher text. Can you solve this? This looks like encoded PHP with base64/str_rot13/gzinflate eval. nI31RZG+Rxb1RZGzRMfsOdNql2K9RsesRLDVOdNqnLWtOdNqRtJtRtm1RZG8OdNrmxb1R/...
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3answers
559 views

Is sending a password encrypted or as SHA1 any safer than clear text?

It seems to me that if an attacker can intercept my login request (sent with HTTP POST), then he can replay it later, no matter whether I try obfuscate it or not. What am I missing?
3
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1answer
34 views

Is using PGP/MIME or PGP Inline more secure?

Using Enigmail for Thunderbird, the setup wizard automatically sets itself to PGP/MIME and also disables HTML formatting. I am looking for security and have no idea which to use, though I do know HTML ...
3
votes
2answers
70 views

How to secure communications between a web front-end and the web server when/where the HTTPS protocol is compromised?

A country in the Central Asia has issued a law enforcing all the ISPs to decrypt the transit HTTPS traffic and encrypt it with a special certificate issued by the government. Every client is to ...
0
votes
1answer
282 views

Filtering Telegram Traffic

I want to filter Telegram Messenger to monitor the network activities (logging) from any platform. I'm wondering if there is any signature I can look into to detect the traffic, maybe a list of server ...
0
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4answers
183 views

Encrypting text data by replacing characters?

I have been thinking on this method but did not really get into it because I thought it was stupid to do for some reason, maybe because I've never heard of it and it's pretty obvious. But today I got ...
0
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2answers
55 views

How would I brute-force a Bitlocker recovery key?

I have imaged a hard disk and used passware, but to no avail - it says Encryption key External key, and not the actual key. How do you think I would go about brute forcing it? Lets assume I had ...
4
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0answers
37 views

Laptop Encryption variables

If you are running such an operating system as Ubuntu among others, you would of seen that it gives you the polite option to encrypt your Home directory OR Whole hard drive with a robust AES 256bit ...
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0answers
5 views

GEA3 direction clarification

GEA3 (and 4) stands for GPRS Encryption Algorithm. It's specified in 3GPP TS 55.216 (at least used to, until some idiot forced them to hide it because of "export restrictions" or some crap like that). ...
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0answers
9 views

Where partially homomorphic encryption schemes like BGN are used?

Schemes like Boneh, Goh, and Nissim are interesting, because of support of polynomially many additions and one multiplication. The algorithms are indeed simple https://eprint.iacr.org/2010/182.pdf ...
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16answers
10k views

Ensure that a file can only be decrypted after a specific date

Are there any cryptographic schemes/protocols that would allow me to encrypt a file, make it publicly available, but ensure that it can only be decrypted after specific date? I assume it would be ...
1
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1answer
39 views

Why aren't there FIPS level 4 devices on the market?

While searching for a secure USB to use, I came across the Aegis secure key, which has FIPS Level 3 (140-2) security. I believe that it's the securest flash drive on the market. I found that the ...
4
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2answers
203 views

How to decrypt the below encrypted messages? [closed]

My friend was experimenting with the encryption methods (self-made) to encrypt text using ASCII map. He wanted to try this idea whether this encryption can be broken and so shared an encrypted text ...