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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773 views

Linux, TRESOR and XTS

I want to switch from using LUKS for full disk encryption to TRESOR. TRESOR tries to prevent cold boot attacks by storing the encryption key in the CPU's registers. It uses the kernel's crypto API for ...
4
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48 views

Bidirectional encrypted server to server communication using TLS

I have 2 Windows servers and would like to set up encrypted communication between them using TLS. I've been reading up on TLS and X.509 certificates and I think I have a reasonable plan, but would ...
4
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231 views

Why does Java allow AES-256 bit encryption on systems without JCE unlimited strength policies if using PBE?

It's fairly standard knowledge that due to the cryptography export controls, Oracle JRE ships with "limited" cryptographic strength enabled as listed in the JCA Documentation. For AES, the default max ...
4
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76 views

DPAPI Distributed key manager

I have a number of configuration files and binary data that needs to be stored encrypted on disk. Only the user who encrypted should be able to decrypt the information. So far, I have successfully ...
4
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0answers
168 views

Is the GTK or MIC in the unencrypted portion of a WPA protected frame?

In order to decrypt traffic you must have all 4 portions of the WPA Handshake. In WPA protected data frames, is there an unencrypted portion of that frame that has some sort of identifiable value to ...
3
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218 views

Security for Hospital IT

I'm developing a program in Java intended to be utilized in a hospital. The system uses RMI internally between workstations and the server program. The program would be installed on the hospital's ...
3
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67 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 ...
3
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60 views

Is ECB secure if I can guarantee that I never encrypt the same block twice?

After reading about modes of operation for block ciphers, I've found that basically all discussions about ECB end with: "never use ECB". For example this security stachexchange answer. However my ...
3
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46 views

Could RSA be used as a block cipher?

I always thought that the reason we couldn't use it was because it required too many CPU cycle. But an answer from @TomLeek indicated that this was not the case : ...
3
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111 views

What is the openssl equivalent of using java's KeyPairGenerator?

I have been using java's KeyPairGenerator in order to generate public/private keys within a program so that I can encrypt and decrypt files(also using java encrypt/decrypt methods). I want to be able ...
3
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390 views

Cellular encryption algorithms currently in use globally

I have been doing research on the available encryption algorithms used by commercial mobile providers worldwide, and would like to know if the following list is complete: Algorithms for voice ...
3
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203 views

Enterprise message bus encryption

I'm contemplating using Amazon's Simple Queue System as the basis of an enterprise message bus. According to Amazon, the contents are not encrypted, which means the application(s) will have to handle ...
3
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88 views

How to encrypt and authenticate large amounts of data with NaCl

In a current project the NaCl-library crypto_box function has been used to encode and crypto_box_open to authenticate and decode data. However the library does not seem to support de- / encoding of ...
3
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126 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: ...
3
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130 views

Generate secure one-time codes containing information

I need to create a system that allows a user to enter codes to charge an allowance. Embedded in this code should be the amount to charge the allowance. The user would pay for a code which would then ...
3
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171 views

Proper credit card encryption for use in a blacklist

I have a general encryption question. I have read through many of the encryption related questions here and I can't find any specifically addressing my concern. This is the hypothetical scenario: I ...
3
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44 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 ...
3
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255 views

Some http requests are not send encrypted by vpn! Why?

I subscribed to a VPN service recently, and installed wireshark to take a look at the traffic sent from my computer. Practically all of it goes through UDP protocol, encrypted. But there are two HTTP ...
3
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267 views

Routing Protocol Encryption

As far as I know 'newer' versions of routing protocols support authentication between routers. What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which ...
2
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48 views

Safe to Encrypt ClientId (Integer value) to use as Client Key?

Asked a follow up question (see this link). Based on my understanding, I have to issue an unique ClientId and Client Secret Key to the API subscribers right after the registration phase (client lives ...
2
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65 views

Unable to access “encrypted.google.com” with “proxy.googlezip.net”

I use Google data compression proxy with Firefox (Abrowser 38). Most websites are loaded without any problem but unable to access encrypted.google.com So, is this is normal? i.e I've to use system ...
2
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0answers
77 views

What's the standard protocol for secure contactless communication

A contactless smartcard has to communicate with a reader in a secure way. The ICAO standard, for example, defines an encryption key (check BAC, EAC and PACE), so that the communication is not ...
2
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0answers
95 views

How do ad networks and analytics providers encrypt/hash their traffic?

I am trying to observe what types of information android apps are sending to ad networks that are integrated into apps. I used Fiddler to decrypt the https traffic. However, some ad networks seem to ...
2
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36 views

How to safely decrypt user data in scheduled script

I have a web application with a lot of stored db data, some of which is encrypted. The data is encrypted with a surrogate key, which itself is encrypted with a hash of a user password. Upon request ...
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115 views

Biometric device instead of password - signature security

Lets assume that there is a biometric algorithm for user authentication which compares fingerprints with an user's signature saved in database (comparing function is not important here). Next there is ...
2
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51 views

Security implications of providing an encryption/decryption oracle

I need to provide a service that acts as a symetric encryption/decryption blackbox : the box get a secret key k users send datas d, and get ciphertext c = Encrypt(d,k) users send ciphertext c, and ...
2
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73 views

If someone hacks our server, how can we prevent them from decrypting data stored in Vault?

I have been tasked with evaluating Vault in our company and the first question asked by an architect was: If someone hacks our server, how can we prevent them from decrypting data stored in Vault? ...
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110 views

Hiding symmetric key inside encrypted data

My server generates an AES encrypted file which when downloaded acts as an input for an application. So, should I hardcode the symmetric key inside the application or should I randomly generate the ...
2
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141 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 ...
2
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167 views

How is Tresorit client-side encryption key stored and managed?

I am using Tresorit on Mac OS X and iPhone. When I am using it there is always applied client-side encryption before posting the file to cloud. The key used for encryption is AES-256 and CFB mode of ...
2
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116 views

Is it possible to trick a CA into signing a certificate by intercepting on SSL domain validation email?

From my understanding domain validation certificate are verified by receiving an email on some special email addresses on the domain (e.g. postmaster@example.com, admin@example.com) or by sending on ...
2
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95 views

For use with RC4 how do I combine a reused key and an initialization vector

I am an a-level student writing an encryption program using an rc4 implementation I have written myself. I have the basic algorithm coded correctly (and I have checked that some ciphertext for a given ...
2
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163 views

Password Encoding/Encryption on ODC connection Strings

I'm interested to understand how passwords provided in ODC (Office Data Connection) connection strings are encoded or encrypted. The format of the connection string is ...
2
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174 views

Older Cell / Smart phones were susceptible to bluesnarfing / bluetooth attacks, Why specifically are smartphones secure from this attack now?

Older cell / smart phones were susceptible to bluesnarfing / Bluetooth attacks, Nokia phones in particular. But now in days, modern smart phone and cell phones that use Bluetooth technology for ...
2
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448 views

Database row level encryption scheme

I am wanting to secure some highly sensitive data in a database. This would mean that the data needs to be encrypted and remain secure for 100 years if it were to fall into adversary hands. I also ...
2
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64 views

What flexibility does a “Third party gamma” offer to U-Prove deployment?

The U-Prove SDK has the following comment: (link) // 1: CA-RA split (a party trusted by the issuer provides the gamma value) Given that the Gamma value (if provided) overrides the Attributes value, ...
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58 views

Can I decrypt a DiskCryptor-encrypted hard drive using Veracrypt?

I have a hardrive I encrypted with DiskCryptor back when I was using Windows. Now that I have Linux I want to decrypt the hard drive but it turned out DiskCryptor is not available for Linux, whereas ...
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32 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 ...
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76 views

Securely storing users PIN on Android with fingerprint authentication

I am have an Android app where the user can enter a pin specific to a particular phone to save them entering the full password. I'm now looking at the new fingerprint reader API on Android M where I ...
1
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0answers
45 views

Curve25519xsalsa20poly1305 key derivation

I'm working on batch-encryption of files, for a small project of mine. The files are stored encrypted on a removable drive, and the keys are stored on a trustful server. For enhanced safety, I'd like ...
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70 views

Multi-Region MySQL Deployment on AWS - How to Encrypt?

Problem: AWS offers the managed RDS MySQL database service in which you can encrypt and manage keys using AWS's Key Management System (KMS). Unfortunately encrypted database snapshots cannot be copied ...
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97 views

Best way to implement secure client/server communication in Python

For a college programming assignment I have to implement a secure communication protocol between a server and one or more clients. Upon instantiation of the server program, a file is generated, call ...
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70 views

Customized approach to protect plaintext passwords/usernames in database table?

I'm in the process of building an app to let users sign up, connect their many email accounts (like Gmail) to the site, and allow email-related activities... like sending an email (please don't ask or ...
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49 views

Is there anything to worry about — worth putting security on a simple test site?

So I want to make a site, this site won't have users (so no one but me will be able to post to the site) or anything it will just echo out items from Mysql like title and text-body I was wondering if ...
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54 views

Is there a solution for On-the-fly-encryption with active directory rules & policies?

I am looking at having our servers' sql databases for a few program and documents to be always encrypted on the HDD, but available to AD users. So one or multiple users with the right AD privileges ...
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62 views

Possible vulnerabilities in private chat application implemented using web broadcasting

I have never used web-sockets but I am working in a PHP framework which has builtin broadcasting facility. This broadcasting use web-sockets technologies named Redis and Pusher. The workflow of this ...
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0answers
79 views

How can I use session salt for encrypting data using AES in CTR mode?

I have to implement a crypto-plugin in Java. The approach followed is conceptually similar to that used for SRTP. The algorithm used for data confidentiality is AES in CTR mode (I'm following a ...
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382 views

What web browsers support ECC vs DSA vs RSA for SSL/TLS?

We are updating our wildcard certificate and see that we have the option to use both RSA or DSA with Symantec (for free), while Digicert offers 3 options for wildcards ECC, DSA and RSA. Is there a ...
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74 views

Possible to use Cellular encryption data to validate Geolocation?

I need offline-verifiable, time stamped, GPS signals or its equivalent. Since cellular protocols include time stamps, encryption keys and other data, perhaps it's possible to re-use this ...
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99 views

How do TSC (TKIP sequence counter) calculate into WPA?

I'm reading about 802.11, from IEEE's pdf (IEE pdf), from page 1191, and in particularly I'm reading about TKIP. And to decrypt and to encrypt used a TSC (TKIP Sequence Counter) as you can see in ...