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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120 views

Trust level of whole disk encryption software

For example, if we take this software into account: Symantec Endpoint Encryption Sophos Safeguard Encryption How can we trust suppliers of whole disk encryption software in the lights of the ...
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1answer
79 views

Secure voice app [closed]

When I look in the Google play store (android apps market), I see that there are a lot of apps to make secure phone calls. However, all the apps I have seen so far all seem to use data packets over ...
0
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4answers
200 views

How safe is it to use older/unknown Encryption methods for plaintext?

When mailing or chatting with people, it had crossed my mind, what if, for simple communication, someone would use an older encryption method (i.e., ENIGMA), to encrypt their message? Would because ...
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2answers
149 views

typical request, what type of encryption is this? [closed]

so our company's CTO quit, and i replaced him and we need to change the system's passwords, however some passwords are encrypted in our database and i need to know what encryption to use in order to ...
2
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3answers
149 views

Can a form submission be encrypted even though address bar shows HTTP?

I was going to apply for a Student ID card through ISIC, but noticed that the form where they ask for payment (such as credit card number) details is not available through HTTPS. The URL to their ...
0
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2answers
95 views

Lock And Unlock Files Using USB Key

I am looking for a way to make a set of files only able to be read when a USB key is plugged into the system. For example, if I have FILE A on my C drive and I try to open it, it will say something ...
11
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10answers
18k views

Techniques for Writing Encryption Algorithms (Exclusively For Personal Use)

I'd like to preface this question by stating that I fully understand the dangers of writing your own encryption algorithms, and I would never, ever, use homemade encryption to secure the data of ...
2
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1answer
45 views

Do I need to save the IV generated to the database?

I see plenty of answers for what and how to use IV. But is it important to keep the IV saved for decryption? I would think so, but I haven't seen anyone saying anything about this. If you want a ...
21
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4answers
3k views

How would you store a 4 digit pin code securely in the database?

I'm familiar with password hashing, using salts, bcrypt etc. But it doesn't seem like this would work to store a 4 digit pin code since the attacker could try all 10,000 combinations quite quickly. ...
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3answers
229 views

Are there any disadvantages to encrypting the password hash?

Is encrypting the password hash in database more secure than storing only the hash? Suppose we store encrypted SHA-256 result with AES instead of hash directly. Is this a good protection from a ...
0
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3answers
205 views

How strong is a simple XOR encryption with random IV?

I'd like to implement some kind of simple (yet as strong as possible) encryption for my client-server application network traffic. Data to be encrypted can be both textual, and binary. Now I'm ...
0
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4answers
135 views

Basic question about why it's useful to have VPN encrypt traffic

There may be a basic flaw in my understanding of how the internet works so sorry if this is a simple question. What type of attack does VPN protect against? For example if a local area network (let's ...
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0answers
39 views

should I encrypt a certificate used only for automation?

I have a PEM file used only for automatic builds and tests on amazon. My project is open source and I am keeping all information on github. If the information is sensitive, I encrypt it and still ...
0
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1answer
357 views

Wifi Educational Hacking - Aircrack-ng wpa vs wpa-psk

I have a question about the max amount of dictionaries need to crack a wpa2 or wpa2-psk password I am using aircrack-ng on ubuntu Is there any possible way to calculate the maximum amount of ...
0
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1answer
40 views

PCI DSS Compliance for a Level 4 organization

We are a small company and process less than 500 Credit Card transactions each year so we fall under Level 4 category merchants. The company heads wants to make sure that we are PCI compliant at all ...
11
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4answers
11k views

Is RedPhone a secure and secret way to communicate?

RedPhone provides end-to-end encryption for your calls, securing your conversations so that nobody can listen in. But really, how is the probability that a voice conversation is wiretapped still? ...
3
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6answers
3k views

How are ProtonMail keys distributed?

There is a service called ProtonMail. It encrypts email on the client side, stores encrypted message on their servers, and then the recipient decrypts it, also on the client side and the system ...
9
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3answers
2k views

Suitable cipher for SMS encryption

I would like to create application for encrypting SMS messages. After long enough discussions I decided to use symmetric encryption, since handling public/private keys issue is too difficult for most ...
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1answer
77 views

encryption of Google's android apps

Does Google use encryption on it's Android apps like Gmail, drive, Google Play, docs, others in authentication and transit? What the type of encryption is it? Is it secure? I have tried searching ...
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2answers
103 views

Encrypted retrievable password

I have a password conundrum. I need to store an encrypted password in a DB table but in such a manner that would allow me to retrieve the password as plain text afterwards. Please note that this is a ...
0
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1answer
72 views

Can a botnet be used to effectively break encryption keys?

Can a botnet amass and coordinate enough computing power to break encryption keys that are typically considered to be secure (through brute force)? If this is the case, do we need to make our ...
-1
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1answer
48 views

Calculating the breakability of a given encryption method

I will soon be doing a very important project for school. The main goal of my project is to find a mathematical way to calculate the breakability of a given encryption method of ciphertext. Is there ...
0
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2answers
72 views

Legality of cookie(set by other sites) tracking

I have created a website A which asks username & password, there exists another closed source website B which again asks for login credentials. A user uses both these websites .I want to ...
3
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2answers
271 views

how to know which encryption is been used [duplicate]

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."azOwKPoUYP4=" is ...
12
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6answers
12k views

Where does SSL encryption take place?

I checked the data transmission of an HTTPS website (gmail.com) using Firebug. But I can't see any encryption to my submitted data (username and password). Where does SSL encryption take place?
3
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4answers
219 views

How much of a risk to students is an open WiFi network on campus? EDIT: please read in full.

I've been battling bureaucracy at my community college for months on this issue; a few months ago, they changed security on the SSID for students; It used to use EAP, allowing students to enter their ...
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1answer
140 views

Who can help me decrypt [closed]

There is a string: 51141010379856000173550010000111151512908026 which after encryption becomes: l4yAOVWeHlk4tnNu3HlJnxMUppeOWCpIqmRKkUPQHlgNawdYMDK2mnieDazPkJuI ...
7
votes
1answer
916 views

Secure Boot on Microsoft Surface Pro 3 (or modern PCs)?

Got a Surface Pro 3 today (it's awesome BTW!) and noticed in it's EFI that it's got TPM enabled, "Secure Boot" enabled (unsure what such an umbrella/catch all term actually covers) And then in ...
3
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5answers
193 views

Can we have https without certificates?

I apologize in advance if I am fundamentally misunderstanding something, but is it possible to have encrypted communication protocols (https, I suppose) without resorting to a certificate system? ...
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2answers
164 views

Find DES encryption key having input and encrypted output

Having the source string: S3nh4#1 And the generated encrypted string: csf7259aT07Rw Using this script, it identified the algorithm used to encrypt as DES(Unix) I wonder if it is possible (in ...
-2
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1answer
149 views

What kind of encryption is this? [closed]

I'm trying to discover what type of encryption was used to generate this strings: Qo94v0JpPaL59LS6U3xfEB4nVgc= +3ZaEliGZ7DWte+LaviHvOlcg9A= v44x/KnS/JyOVDtbmbkFkJEgkWs= y75nHoG/yXwutlixBX7/jRXsv+o= ...
1
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1answer
92 views

Will ios8 encryption fail on forced shutdown?

I understand that IOS 8 data can be encrypted when the phone is locked, and decrypted for use when the phone is unlocked. But let's say the phone was unlocked (and thus the data is decrypted), and ...
0
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1answer
123 views

How come PBEWITHSHA256AND128BITAES-CBC-BC violates the 128bit key limit?

In my Java application (which use StandardPBEStringEncryptor by jasypt), when i use the PBEWITHSHA256AND128BITAES-CBC-BC algorithm instead of something weaker such as PBEWithMD5AndDES, i get an ...
2
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2answers
1k views

How secure is GnuPG conventional encryption (with defaults)?

How secure is the encryption of files when using GPG this way? gpg -c personal.zip It will not use any keys or other lines. And how good is it compared to TrueCrypt? Note that I will upload ...
1
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2answers
176 views

Certificate security in intranet environment?

We have this topology in our company: A new rule says that each document being sent by Outlook should be encrypted. We decided using PGP. We already have a certificate (self-signed). The problem ...
5
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3answers
2k views

Bittorrent Sync encryption

Sync, a new product from BitTorrent, Inc., has been cited as a viable alternative to other cloud-storage platforms. The Sync FAQ indicates that an encryption scheme is being used, but does not comment ...
1
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2answers
80 views

Storing AES password for verification

I was wondering if such practice would be safe: I have a table that stores encrypted notes Every note has a data field and a password field When a password is entered, i want to select all notes, ...
0
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1answer
64 views

Is there an AES 256 LUKS encryption option in Fedora? [closed]

I have certain information on my drive that I don't want anyone (not even me ;) ) to gain access to. I read recently that Fedora only offers EAS 256 LUKS encryption. This just isn't secure enough ...
1
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1answer
179 views

How can you check if a private key and certificate match in OpenSSL with ECDSA?

I know how to do this with RSA keys (see this article: Determine if private key belongs to certificate?) however I do not know how to do this for ECDSA certificate / key pairs. With RSA keys, the ...
1
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3answers
111 views

Potential risks when sending plain text E-Mails with encrypted attachments?

To ensure privacy in communication I encrypt and sign E-Mails using gpg4win. However, sometimes the communication does not work as expeceted (GPGTools and Outlook/gpg4win seem to be incompatible). In ...
0
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1answer
61 views

bitlocker and data retrieval

The data on my hard disk was deleted from an encrypted bitlocker hard disk. After deleting the data, a new partition including a new installation of windows was created on the same hard disk. The key ...
1
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2answers
155 views

Stream/block cipher add a simple hash to guarantee integrity

The question is simple: Adding a hash to a message and then encrypt it using a stream cipher / block cipher. Why can't this guarantee integrity of the message upon decryption?
0
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2answers
61 views

Storing CardHolder Data using RC2 encryption

I would like to know if storing credit cardholder data using RC2 encryption requires to be compliant with PCI DSS. Currently the 16 digit PAN number and expiry date is stored in the database. The PAN ...
27
votes
3answers
3k views

Tell people that I can encrypt emails

I know that it is still not very easy to use PGP for an average user. However, the situation is improving (there are some easy plugins that can even nicely integrate into your GMail webmail). In ...
16
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2answers
2k views

Flaw in encryption through pseudorandom number stream (from PGP documentation)

I was reading PGP docs and came upon a part written by Phil Zimmermann (PGP's creator) that piqued my curiosity: When I was in college in the early 70s, I devised what I believed was a brilliant ...
2
votes
2answers
187 views

Obstacle in Implementing a Time Limited/Number of Use Limited Software

How does one implement a trial period in a product properly, e.g. a trial period that lasts 30 days, or limits the number of product uses to 10? Storing the entries, even in an encrypted form, isn't ...
1
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1answer
116 views

Real time application of AES and DES [closed]

I am writing a paper on reducing the power consumption of security protocols. I am having trouble identifying sources that describe real-time usage of DES and AES, and how often they are used. I plan ...
4
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3answers
176 views

Anonymiszing sensitive data in MySQL DB while retaining searchability [closed]

I have a MySQL database that stores sensitive (personal) data about individuals; and have been tasked with ensuring that this data is encrypted in some way to protect the individuals and their data if ...
9
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4answers
2k views

Truly deniable encryption

What tools can be used to make truly deniable encryption? Suppose, authorities can use any force to make you open your passwords. Truecrypt can have only one hidden container, which means that ...
3
votes
1answer
241 views

Can Fiddler decrypt HTTPS traffic when using elliptic curves + client cert authetication?

Case 1 involves TLS + client certificate authentication with both client and server using secp384 based EC certificates. In this case, when monitoring traffic via fiddler, the tunneling/handshaking as ...