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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Why has Convergence stalled out? [closed]

Convergence is a well-thought out system to replace certificate authorities built by Marlin Moxiespike back in 2011. Since it's debut, it seems to have largely stalled out, with no additional major ...
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1answer
78 views

How can I tell if my ISP account password is encrypted?

How can I be sure my ISP encrypts my account password? I found out accidentally that mine did not. I had called to report an interruption in service, and in the process of "troubleshooting", the ...
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5answers
590 views

How to safely store sensitive data like a social security number?

I am looking for a way to safely store personal information with low entropy safely. I have the following requirements for the data: Must be able to search (i.e. to look up an existing piece of ...
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2answers
122 views

Way to decode an encoded payload [closed]

I am facing an XSS vulnerability in my ASP.Net Web application where the malicious code may be encrypted and html encoded Bottomline: I am trying to prevent XSS via code obfuscation. Question: I ...
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1answer
78 views

Is it Safe to Copy a Private Key Using SCP?

Is it safe to copy a private key from one computer to another over SCP? Does this depend on whether you use the same key to authenticate the transfer?
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1answer
109 views

SSL decryption without installing a certificate on each client

Given a proxy performing MITM SSL decryption and inspection, is it possible to install a wildcard certificate (*.domain.com) on the proxy signed by a root CA (such as VeriSign or GoDaddy) such that ...
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3answers
129 views

Are there commercially available hardware encryption devices over USB? [closed]

I'm designing a system where some combination of hardware and software (lets call it an appliance...) sends asynchronous secure archival to the cloud. By secure, I mean, AES-256 encrypted, with AES ...
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1answer
79 views

Automate the process of giving a user access to his encrypted messages, when the user loses his password

I'm implementing a way for users to share messages with other users. All users and admin-users have a unique key pair. A message can be sent from one user to multiple users. Admin-users, who always ...
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0answers
48 views

Automate the process of giving a user access to his encrypted messages, when the user loses his password [duplicate]

I'm implementing a way for users to share messages with other users. All users and admin-users has a key pair. A message can be sent to multiple users. Admin-users, who always have access to all ...
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3answers
151 views

how does the key size and algorithm strength affect encryption strength

The AES algorithm and asymmetric encryption use multiple key lengths that affect the strength on the key used. But, how does the key size and algorithm strength affect encryption strength?
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4answers
283 views

What are the advantages/disadvatages of hashing over encryption?

I know that hashing is a one way function and encrypted messages could be retrieved if you know the corresponding key to which you encrypted the message. Other than the ability to retrieve, what ...
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2answers
140 views

Monitoring user use VPN

If there is an employee uses the internet through an internal proxy in his company, and he use a paid VPN service to browse safely, can IT side be able to monitor his behavior?
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1answer
57 views

Should HMAC key be changed regularly? Should it be kept secret at all times?

I am doing an HMAC of some cipher-text, IV and encryption algorithm. Right now I am using a hard-coded key that is known to both sender and receiver. I was wondering if the key should be changed once ...
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2answers
156 views

How does the TCP/IP lack security? [closed]

I already know that some concerns of lack of security in TCP/IP are that TCP/IP does not support strong authentication of packets and no encryption of packets. What other weaknesses are there in the ...
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1answer
154 views

What encryption does Apple use?

With their iOS devices, Apple allows people to block certain applications through "Restrictions". I recently had an issue with my iPhone where I'm positive that I entered the correct passcode on my ...
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2answers
174 views

How can I separate two OS's files with encryption without using TrueCrypt?

I want to create a dual-boot such that the content of each OS is separated from the other using encryption. The main point point would be to to test out potentially harmful software on one OS, and ...
2
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1answer
157 views

Are there HIPAA requirements to encrypt our database hosted in AWS

I'm developing Medical Billing & EHR Software. On completion we are planning to use AWS for hosting and thus provide SAAS. Do we need to encrypt the MySQL database in order to keep HIPAA ...
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0answers
39 views

Algorithm to Transaction Data Signing

Transaction Data Signing I need an idea to develop a very secure algorithm to authenticate online operations using PHP in the server and an Android app in the user's device. What is the idea? The ...
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2answers
81 views

Encryption in Linux: covenience and security [closed]

I was using TrueCrypt until recently, until one of two options has happened: either it was discontinued or its web-site truecrypt.org was hacked. Any option implies that I don't trust it anymore. So ...
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2answers
163 views

How to determine what type of encryption has been used? [duplicate]

i play an android game which seems to send the player's high score in an encrypted format . some thing like (f11cca35236eebbdc26a0ce45876d117) a 32 character code tried MD5 but no result found. i ...
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3answers
69 views

OpenSSL encrypting small packets bandwidth overhead

I have an c/c++ program used for encrypting data for communicating between two ends. Encryption is done using OpenSSL (0.9.8d-fips, Sep 2006). Think it'll be worthy to mention that I'm not much ...
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1answer
826 views

Are there other ways to encrypt files other then TrueCrypt and BitLocker [closed]

I don't trust BitLocker. Probably backdoored and relies on TPM which can be hacked according to DEFON. It also does not allow for hidden partitions or other advantages like TrueCrypt. With TrueCrypt ...
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2answers
107 views

Where to store a key for system wide encryption/decryption?

I have a web application where (among other things) customers can upload files and administrators can then download those files. The uploaded files are stored on ServerA and the web application used ...
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3answers
158 views

Java AES encryption output length

I am trying to encrypt few database columns (string values) using Java AES algorithm. This is to protect certain sensitive data. For some users these data should decrypted. In Java AES encryption, if ...
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3answers
227 views

How Safe Are Encrypted Websites Really?

I was at a coffee shop and had to (I mean had to) check something on my bank account and another account. I figured since the two websites I was viewing were encrypted, and because my computer (I'm on ...
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5answers
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Does using the same encryption algorithm multiple times make a difference?

In TrueCrypt I noticed the option to encrypt a volume with multiple encryption algorithms i.e. AES-Twofish-Serpent. Would it be useful to encrypt something with the same algorithm multiple times? For ...
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2answers
55 views

Secure process threads

I was pondering my computer theory and this question has been bugging me for a while . Is it possible in some way to have a running process with its memory "encrypted" on an insecure system ? If ...
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0answers
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Cisco/Juniper IOS hacking?

I am a University student and i'm currently working on a paper of ethical hacking. I have already investigated a lot about Web based attacks(SQLI,XSS,...) and about two months ago I started learning ...
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1answer
215 views

How to handle private key encryption/decryption for web application

In the process of designing a web app that handles public/private key pairs - a Bitcoin web app, specifically - I've had a lot of thought on how to securely handle the storage of the private key, ...
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1answer
61 views

How to secure an embedded linux image

I'm building an image with openwrt sdk and i want to secure my image (by encrypting filesystem for example).. How can i do that to prevent anyone from seeing my sscripts or programs running ?
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1answer
78 views

Car Remote App Security

Car manufactures like BMW, Audi or Mercedes-Benz all provide mobile applications to control your car. All apps share really critical functions like remote lock/unlock or the ability to find your car ...
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110 views

Cryptanalysis of encrypted data at rest

Imagine I have a file encrypted using AES CBC mode with a key and a random IV. The attacker access to the encrypted text and the IV used but not the key. In this scenario there is no vulnerability ...
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0answers
54 views

encryption for short messages [closed]

Are there any algorithms/modes that work particularly well for shorter messages? (hundreds of bytes at most, usually < 100 bytes). I am looking at it from both security and performance point of ...
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2answers
283 views

Is Mumble encryption end to end?

Is it possible for a Mumble server operator to monitor or record users' conversations? Or are Mumble conversations encrypted end-to-end?
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6answers
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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 ...
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1answer
3k views

Is all data sent over SSH encrypted?

When you are connected to another computer over SSH, is all data transferred between the two computers encrypted? Or is any data sent in plaintext or any other "easy to intercept" format?
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How secure would this method be considered for password storage

Ok I am currently storing the passwords in most secure way I could think of. With use of Encryption and Hash. The passwords are first generated by user as plain-text with minimum length of 6 ...
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4answers
65 views

Proof that client app is using the recipient's public encryption key

I'm trying to implement a web app(lication), which allows to share data automatically with connected users. Data will be encrypted end-to-end asymmetrically on the clients. My first plan was to share ...
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2answers
92 views

How to compare encrypted private keys?

Is it possible to compare encrypted private keys if you do not have the passphrase? E.g.: openssl genrsa -out unencryptedprivkey.pem 2048 openssl rsa -in unencryptedprivkey.pem -aes128 -out ...
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1answer
83 views

Which default encryption does openSSL use?

If I create a private key via: openssl req -x509 -newkey rsa:2048 -out cert.crt then openssl writes the private key to the file privkey.pem and if you do not provide the "-nodes" command it will ...
2
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2answers
169 views

Using a TPM with Linux

I have the need for a company laptop (Dell e6540) that contains our java application on it to go out for evaluation purposes. For this reason I would like to make sure that the HDD is protected from ...
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0answers
44 views

Managing keyczar keysets across multiple servers (google compute engine)

I'm a developer building a web service that will be required to store a few credentials for 3rd party services that would themselves provide access to customer data that I would consider sensitive. ...
2
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2answers
111 views

Does having multiple nearly identical copies of an encrypted file make it easier to decrypt?

I store my passwords in an encrypted database file in the cloud. That is, my KDBX files from KeePass are stored in a cloud storage server, let's say it's Dropbox. Dropbox, whether they admit it or ...
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3answers
136 views

Encryption and Layers understanding

If I'm right the SSL encryption take place in the application layer, but we can also have encryption in the Internet Layer. Why are we using both, and why sites that doesn't have SSL are considered ...
0
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1answer
91 views

Serpent cipher technical details in-depth [closed]

Would anyone be so kind so as to describe to me the Serpent-256 cipher? How does it work and how secure is it compared to AES? I have searched everywhere and found scarse info about it. Anything ...
2
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1answer
89 views

Stream/Block encryption using XOR and Hash function?

Could a hash function like sha1 or ripemd-160 be used for secure key generation in a stream/block cipher? Obviously a repeated key like "abc123abc123abc123" would be bad, and a one time key pad would ...
2
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3answers
117 views

Securing data on a server

I have a server which has 'loose' physical security (somewhat easy for the entire server to get stolen). For the sake of the question, let's assume that anyone can access the server physically, what ...
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1answer
225 views

Safety of TrueCrypt hidden volumes

According to the documentation a hidden volume stays hidden because it appears as free space. In TrueCrypt free space always has random data in it, however in the case of a hidden volume it's not ...
2
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1answer
109 views

How secure is Vigenere cipher for random data?

Traditional situation It is easy to crack a ciphertext encrypted by Vigenere cipher, if you know the plaintext is in a natural language like English. There are two methods to discover the key used to ...
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1answer
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Knowing Input&Output, How to determine encode method and the passkey that was used in encoding?

I've looked on this site and on SE. but I couldn't get a handle on this. Is there a way to find what type of encoding (and/or encode key) is being used? For example, I am testing a web ...