Hardware Information |
|
Video Encryption
What is Video Encryption? Video Encryption is an extremely useful method for the stopping unwanted interception and viewing of any transmitted video or other information, for example from a law enforcement video surveillance being relayed back to a central viewing centre. The scrambling is the easy part. It is the un-encryption that's hard, but there are several techniques that are available. However, the human eye is very good at, spotting distortions in pictures due to poor video decoding or poor choice of video scrambling hardware. Therefore, it is very important to choose the right hardware or else your video transmissions may be un-secure or your decoded video may not be watchable. Some of the more popular techniques are detailed below: Line Inversion: Method: Whole or parts of the signal scan lines are inverted.Advantages: Simple, cheap video encryption.Disadvantages: Poor video decrypting quality, low obscurity, low security. Sync Suppression: Method: Hide/remove the horizontal/vertical line syncs. Advantages: Provides a low cost solution to Encryption and provides good quality video decoding. Disadvantages: This method is incompatible with some distribution equipment. Obscurity (i.e. how easy it is to visually decipher the image) is dependant on video content. Line Shuffle: Method: Each signal line is re-ordered on the screen. Advantages: Provides a compatible video signal, a reasonable amount of obscurity, good decode quality. Disadvantages: Requires a lot of digital storage space. There are potential issues with video stability. Less secure than the cut and rotate encryption method (see below) Cut & Rotate: Scrambling Method: Each scan line is cut into pieces and re-assembled in a different order. Advantages: Provides a compatible video signal, gives an excellent amount of obscurity, as well as good decode quality and stability. Disadvantages: Can have complex timing control and requires specialized scrambling equipment The cut and rotate video encryption method is probably the best way of achieving reliable and good quality video encryption, an example of a good implementation of this system is in the Viewlock II Implementing vice scrambling The video scrambling hardware, in particular the decoder should function correctly even if there is a noisy (for example having what are commonly known as 'snow' on the screen. 'Snow' is when there are flecks on your TV screen, often seen in poor reception areas) or unstable signal. If the link to the encrypted signal should stop working then this should not be a problem. The link between the video encoder and video decoder should be regained and the decryption quickly continued. The very nature of security camera systems is that they are often outdoors as so must be able to withstand the rigours of the weather. The video encryption hardware should be stable under or protected from the effects of rain, sunlight, extreme heat and cold. It should not be damaged if there is a power spike in the supply. In these systems the video encoder emits a wireless signal to the video decoder unit before it is viewed, it obviously must be the case that the very act of broadcasting the signal does not effect the video encoding hardware and likewise the video encoding hardware should not effect the radio transmitter. The most important item is that the video scrambling system should be secure, else why bother? It is amazing how some encryption methods can easily be cracked. For example certain cable television stations 'encrypt' their channel broadcasts via a relatively un complex method, which can easily be decoded using a number of cheap bits of electronics from radio shack. That would obviously be illegal! The cable TV's method of encryption is very crude, they usually just dynamically alter the vertical sync signal so that your TV cannot get a proper lock on it and so it scrolls randomly. The other extreme is to scramble the transmitted video signal too much so that it is costly both in equipment and time to the video at the receiver. Remember that this is a 'live' video scrambling broadcast followed by a 'live' video decryption display. ANY electronics can be copied, given enough money and time, but making this process as hard as possible is of benefit as it at least delays the time when illegal copies will be available. Finally and most obviously each user must have a unique encryption key so that other users of the system cannot view the transmitted video by accident or purpose without the key owners knowledge. The total number of possible user keys must be such that it is highly unlikely for someone to guess the correct key. Ovation Systems are specialists in the design and manufacture of high quality covert video surveillance equipment. Products include the Viewlock II video encryption system.
MORE RESOURCES: Asus vows to improve clarity surrounding warranty claims and astronomical hardware repair costs Tom's Hardware What we know so far about AMD's Zen 5 CPUs Windows Central Nvidia RTX 4070 Ti with memory mod easily beats RTX 4080 in Superposition benchmark - Tom's Hardware Bye Bye, AI: How to turn off Google's annoying AI overviews and just get search results Tom's Hardware Montclair hardware store to close after 131 years in business News 12 New Jersey My Mom and Dad Owned Competing Side-by-Side Hardware Stores. It Was a Lesson in Life. The Wall Street Journal OP police looking for 6 people involved in hardware store theft: WDAF FOX4 Kansas City Hardware Store In Montclair Closing After More Than A Century Montclair, NJ Patch Hardware Center in Paoli shutting down after nearly 73 years The Philadelphia Inquirer Ace Hardware Reports Increase in Q1 2024 Revenues Hardware Retailing Canyon ISD brings home hardware at UIL state tennis tournament Press Pass Sports Microsoft, Meta, Amazon, and other tech giants are cutting back on headcount—but their spending on hardware and ... Yahoo Finance Best Tech and PC Hardware Deals Tom's Hardware Overland Park police searching for suspects in multiple thefts KMBC Kansas City ACE HARDWARE REPORTS FIRST QUARTER 2024 RESULTS PR Newswire Intel-powered Aurora supercomputer fails to dethrone AMD-powered Frontier on Top500 list, again — claims spot as ... Tom's Hardware Three-year-old CPU beats Intel's fastest current chip in RAM benchmark — 7 GHz Core i9-11900K tops 8.3 GHz Core ... Tom's Hardware Enthusiast gets Windows XP running on an i486 — merging two dinosaurs from different eras Tom's Hardware Best Webcams for 2024 Tom's Hardware OpenAI's new assistant makes Apple's Siri look primitive, also announces GPT-4o and new desktop PC client (Updated) Tom's Hardware How Much Does It Cost To Open an Ace Hardware Franchise? 1851 Franchise Massive Dell blunder leaks Intel and Nvidia's mobile roadmaps — Nova Lake, Panther Lake CPUs and GENxx Nvidia ... Tom's Hardware Ace Hardware purchases 13 local chain store locations across central Illinois The State Journal-Register Melaco Sisters Hardware & Supplies Player of the Week: Zariell Pollard Lafourche Gazette DisplayPort 2.1 has a serious issue with UHBR-certified cables — it could explain Nvidia sticking with DP 1.4 on RTX ... Tom's Hardware Schoolmeester, Diani bring home hardware for Banks | Sports | forestgrovenewstimes.com Forest Grove News times CPU Benchmarks and Hierarchy 2024: CPU Rankings Tom's Hardware Western Digital rolls out new 2.5-inch HDDs for the first time in seven years: is 6TB the swan song for 2.5-inch hard ... Tom's Hardware US to increase tariffs on Chinese semiconductors by 100% in 2025 — officials say it protects the $53 billion spent on ... Tom's Hardware Homegrown European processor for supercomputers delayed by a year — chip upgraded to 80 cores, but timeline gets ... Tom's Hardware GPU Price Index 2024: Lowest price on every graphics card from Nvidia, AMD, and Intel today Tom's Hardware If you think PCIe 5.0 runs hot, wait till you see PCIe 6.0's new thermal throttling technique Tom's Hardware Hardware Wildlife Education Center Utah Division of Wildlife Resources Ace Hardware Brunswick | Ads | fredericknewspost.com Frederick News Post URI club sailing team heads to nationals, collects post-season hardware The University of Rhode Island Microsoft offers to relocate nearly 10% of China-based staffers to the US or allied nations — AI and cloud engineering ... Tom's Hardware Hardware visit Utah Division of Wildlife Resources Intel's 1500W TDP for Falcon Shores AI processor confirmed — next-gen AI chip consumes more power than Nvidia's ... Tom's Hardware PS5 Best-Seller, Sales Drop For All Consoles - Europe Hardware Estimates for April 2024 - Sales VGChartz Nintendo Switch hacked to run Windows 11 on Arm, and it's just about as awful as you can imagine Tom's Hardware Intel's new Thunderbolt Share provides file and screen sharing without hurting network performance Tom's Hardware Ace Hardware partners with Webster Parish Council on Aging for fan drive Minden Press-Herald Area softball teams in search of hardware at various state tournaments Moscow-Pullman Daily News Daily Dish with K&K Hardware WHBF - OurQuadCities.com Windows translator makes PC games run on Android — Fallout 4 demoed at 30 fps using Winlator app Tom's Hardware Our newest hardware office in Taiwan The Keyword | Google Product and Technology News Curt's Ace Hardware Ribbon Cutting - Morristown, TN | Local News | citizentribune.com Citizentribune OLED monitor momentum expected to continue — analysts expect 1.34 million units shipped by year end Tom's Hardware Windows 11 24H2 will enable BitLocker encryption for everyone — happens on both clean installs and reinstalls Tom's Hardware 5 Best Hardware Wallets for DeFi in 2024 CoinCodex Asus quotes ridiculous $2750 fee to replace chipped GPU power connector— docs back up claims of egregious repair ... Tom's Hardware Save up to 50% on BBQs, lawn mowers and garden essentials during Home Hardware's massive pre-summer sale Yahoo Canada Shine On Newcomer Campbell Collects Major Hardware in CAA Softball Postseason Honors Colonial Athletic Association Stack Overflow bans users en masse for rebelling against OpenAI partnership — users banned for deleting answers to ... Tom's Hardware Full scan of 1 cubic millimeter of brain tissue took 1.4 petabytes of data, equivalent to 14000 4K movies — Google's AI ... Tom's Hardware |
RELATED ARTICLES
Inkjet Printer Tips to Select Proper Printer If you are tight on budget, go for Inkjet Printer. Inkjet Printers are more economical compared to Laser Printers. 5 Ways To Backup Your Data... The data on your hard drive is the most critical item inside your computer, and the only item which can not be replaced. It may be an unwanted hassle and expense to replace a defective memory module, monitor, or processor, but there is no replacing data once lost. How To Troubleshoot DVD Drives Fast You really enjoy those dvd movies and games and the last thing you need or want is to experience problems with your dvd drive.To prepare for the possibility of having your dvd drive leaving you out in the cold one morning,we will dicuss problems that may cause dvd failure as well as the procedures you should take to correct these problems. Intel Celeron vs Pentium The Celeron and Pentium Processors are two of Intel's best selling CPUs. They are found in a majority of home computer systems. The Right Way To Discharge Capacitor In Switch Mode Power Supplies Switch mode power supply contain some large filter capacitors that can hold dangerous charges even if the unit has not been used for several days. Typical values of this type of filter capacitor are 220uf 250volt and 330uf 400volt! If you are going to work on the power supply circuits, it's a good idea to discharge that capacitor first. Video Encryption What is Video Encryption?Video Encryption is an extremely useful method for the stopping unwanted interception and viewing of any transmitted video or other information, for example from a law enforcement video surveillance being relayed back to a central viewing centre.The scrambling is the easy part. A Review of Refurbished Toshiba Laptops Toshiba offers a few of their refurbished laptops in the "Clearance Store" of their official website toshibadirect.com. Review: Implementing the Google Search Appliance in an Intranet environment Our corporate intranet is a non-framed environment with both Lotus Domino and IIS (.Net and classic ASP) applications and content. The Merging of Humans and Computers Soon the human brain will be completely interfaced with the computer. The benefit to mankind will be truly significant. A Review of HP Laser Toners Hewlett-Packard is, along with Brother and Samsung, one of the most readily available brands of laser toner. This is due, in part, to the fact that HP was first to release a laser toner inexpensive enough to catch the attention of the average consumer, in 1984. Drop On Demand Printers Most HP and Epson printers are drop on demand printers. They use electrical pulses to fulfill requests for ink. Expansion Cards Part 2: AGP Expansion Cards Part 2: AGPThe first in this series of Tech Tips on expansion cards took a look at the PCI slot, and the variety of devices that may find their home in one. Graphics cards are one of the many items that may be used in a PCI slot, but the demands of fast-paced video games require more speed and greater bandwidth than the PCI Bus can provide. When Good Color Goes Bad... Even with the popularity of digital technology, and the availability of equipment and software associated with it, many printing firms are still slow to make the changes needed to upgrade their business. More so when it comes to digital photography. What is Blu-Ray DVD Video technology has increased significantly over the past years, and is continuing to grow at an incredible rate. Digital Video Disc's aka DVD's are the most likely the last big jump in consumer video technology that everyone is familiar with. Cisco CCNA Certification: Why You NEED Hands-On Practice ! CCNA and CCNP candidates hear it all the time: "you have to get some hands-on experience to pass the exams".Candidates tend to think that's just so they can solve the simulator problems, but that's only the more obvious reason. How To Format A Hard Drive Here's how to format a hard drive (Legal Stuff: We are not responsible for any damages, lost data, or anything of the sort).. Flyback Transformer-How to Locate the ABL Line Whenever there is a complaint about monitorcontrast problem I will check on the flybacktransformer ABL (automatic blanking limiter)circuit.Sometimes a weak picture tube might causedcontrast problem. Does Size Really Matter In Our Digital Age? Well, we've all seen the advert, but that's not what I want to talk about, so get that out of your head straight away. No, let's think about what many call the "Queen of Arts" - namely painting. What is Over-clocking a Processor? Q : What is over clocking?Overclocking is when you make your system processor run faster that its normal speed. This has many advantages and dis-advantages. How To Choose The Best Student Laptop? How To Choose the Best Student Laptop?Merchants are singing those three magic words again,'Back to School' and the fallout is everywhere!Just as you're getting your deep dark pre-cancerous tangoing -- you hear those words -- and it spells the end of summer. Once again we are bombarded with advertising,featuring the latest in 'teen ware' 'school ware' and'metal detector ware'. |
home | site map |
© 2006 |