Many libraries implementing cryptographic primitives provide the possibility to pass arbitrary data as the flag for that primitive into implementation. The way how implementers use this feature varies from implementation to implementation.

Some implementations simply pass the whole input strings as a flag; others split the input byte sequence into parts and pass each part as a flag (usually first byte defines which part is passed). Depending on what implementation do you need to choose the appropriate format of your flags?

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There are multiple possible attacks against custom flags:

  • Wrongly configured CSPRNG output affects all kinds of random numbers used by the target, including randomness used for creating flags. If the attacker can predict those numbers, they might be able to guess flag sequence;
  • An attacker might check the whole possible flag sequence and search for a subsequence that satisfies a certain condition. The attacker needs to test only about 2^k sequences, where k is several distinct subsequences in your flag set. This attack exists against all sources of entropy. For example, this attack works even if you generate your random numbers from physical events which you cannot fully control (e.g., mouse movements). In that case, the adversary just has to try all combinations of mouse clicks and estimate how many distinct subsequences there are in the data stream.

Custom Flags

You might pass plain-text as a flag and the adversary gets the possibility to it with arbitrary data. As a result, an attacker can guess the sequence of the cipher-text and the same plaintext byte sequences will be encrypted into different cipher-texts.

Custom 3×5 Flags

The most commonly used flags are custom 3x5 flags. They can be found flying around anywhere, from houses to schools to government buildings. Each 3x5 flag is made of high-quality polyester and comes standard with two brass grommets on the side for mounting on a variety of hardware.

Quality of Printing and Material: We use dye sublimation printing to print all of our flags and banners on high-quality, long-lasting polyester. This cutting-edge printing technique creates stunning, bold, high-definition prints that are sure to catch the attention of onlookers. In comparison to poorer printing procedures, this printing process produces far less long-term discoloration.

Bespoke Sizing:

Custom sizes for our traditional flags in addition to conventional sizes ranging from 18" x 12" to 10' x 6'. From the size dropdown, choose "Enter Your Size." Each custom flag must be at least 12" wide and tall.

Fishing Option:

Finishing options than other custom flag makers, in addition to high-quality printing and materials. Horizontally alignment, a variety of finishing equipment, and solitary or double-sided print are all available possibilities.

Double-Sided Printed Flag

All custom 3x5 flags have a solid balance print, which means the image is printed on one side of the flag and spills thru the opposing side, allowing it to be seen backward. It is something quite different than the traditional double-sided fabric printing procedure. Each double-sided polypropylene flag is constructed by sewing two single-sided fabric patterns together over a barrier cloth. The opposite image will not flow through as a result of this.

Dye Sublimation Printing

A dye-sublimation procedure, which means your custom printed flags will be inexpensive. Each flag is printed in four colors before being steam-imprinted to bind in the colors. When you mix it with the knowledge that can print precise colors, we can print practically any color.

Premium Specification

  • On one side, all single-reverse flags read correctly, with 80% of the picture showing through to the other side.
  • All custom double-sided flags are readable from both sides, making them ideal for use as custom outdoor flags.
  • The custom flag design is printed on a sturdy, high-quality polyester that passes the blue scale light-fastness test with an 8/8. This implies it will endure 3000 hours in direct sunshine before fading.
  • All flags come with wrapped header tape on the left side and brass grommets punched through the header tape every three feet, with a minimum of two per flag. Upgrades like pole sleeves are available as part of the finishing process.


Q: What is a customized flag, exactly?

Custom flags come in a range of sizes and may be personalized with your images, logos, and inscriptions. Make a personalized flag today to express your ingenuity.

Q: What is the size of a flag?

The standard size for a flag at home is 3'x5'. The size of a casket flag is 9-1/2'x5'. The table below displays the proper flag size for various flagpole heights. Official flags (not personal flags) must follow these specifications, according to Executive Order 10834.

Q: Is it possible for you to make a flag?

Flags are a simple and entertaining craft project for kids that can be done using items found around the house. All you need is some art tools and a little imagination to make a fantastic flag!

Q: What are the materials used to make flags?

Flags have traditionally been made of wool, silk, or cotton. The invention of synthetic fibers has resulted in the majority of outdoor flags being made of nylon or polyester. Every substance has its own set of benefits. Polyester is the most resilient, lightest, and most costly of the materials.

Q: Is it possible for you to fly a casket flag?

Is it permissible for someone who is not a veteran to have the American flag draped over their casket? Yes. The Flag Code does not restrict this use, even though it is normally reserved for veterans or well-known state and national officials.

Q: Is the size of all flags uniform?

Most former colonies and dependencies utilize the same proportions as their mother countries: all British Overseas Territories use 1:2 ratios, whereas most former and present Dutch and French regions use 2:3 ratios.